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IINNEECCUUAACCIIOONNEESS 
IINNTTEEGGRRAANNTTEESS:: 
• DDiieeggoo MMaarrttiinn SSaallaazzaarr DDeellggaaddoo 
• OOssccaarr AAbbeellaarrddoo CCaarriittaa 
CCoohhaaiillaa 
• AAllddoo CCoollqquueeppiissccoo MMaanncciillllaa 
• JJuulliioo CCeessaarr PPaauuccaarr TToorrrreess 
• KKeevviinn CCoossíí CChhuurrqquuii
CCOONNCCEEPPTTOO 
 UN SISTEMA DE INECUACIONES DDEE UUNNAA 
VVAARRIIBBAALLEE EESSTTAA FFOORRMMAADDOO PPOORR UUNN 
CCOONNJJUUNNTTOO DDEE IINNEECCUUAACCIIOONNEESS DDEE LLAAMMIISSMMAA 
VVAARRIIAABBLLEESS.. 
 SSUU SSOOLLUUCCIIOONN EESS EELL CCOONNJJUUNNTTOO DDEE 
NNUUMMEERROOSS RREEAALLEESS QQUUEE VVEERRIIFFIICCAANN,, AA LLAA 
VVEEZZ,, TTOODDAASS LLAASS IINNEECCUUAACCIIOONNEESS.. PPAARRAA 
HHAALLLLAARRLLAASS,, SSEE RREESSUUEELLVVEE PPOORR SSEEPPAARRAADDOO 
CCAADDAA UUNNAA DDEE LLAASS IINNEECCUUAACCIIOONNEESS,, YY 
DDEESSPPUUEESS SSEE CCOONNSSIIDDEERRAANN LLAASS 
SSOOLLUUCCIIOONNEESS CCOOMMUUNNEESS
 EEss uunnaa eexxpprreessiióónn mmaatteemmááttiiccaa llaa ccuuaall ssee 
ccaarraacctteerriizzaa ppoorr tteenneerr llooss ssiiggnnooss ddee 
ddeessiigguuaallddaadd.. SSiieennddoo uunnaa eexxpprreessiióónn 
aallggeebbrraaiiccaa nnooss ddaa ccoommoo rreessuullttaaddoo uunn 
ccoonnjjuunnttoo eenn eell ccuuaall llaa vvaarriiaabbllee 
iinnddeeppeennddiieennttee ppuueeddee ttoommaarr eell vvaalloorr 
ccuuaalleessqquuiieerraa ddee eessee ccoonnjjuunnttoo ccuummpplliieennddoo 
eessttaa ddeessiigguuaallddaadd.. AA eessttee ccoonnjjuunnttoo ssee llee 
ccoonnooccee ccoommoo IInntteerrvvaalloo..
IINNEECCUUAACCIIOONNEESS DDEE PPRRIIMMEERR 
GGRRAADDOO 
UUnnaa eeccuuaacciióónn ddee pprriimmeerr ggrraaddoo ccoonn uunnaa 
iinnccóóggnniittaa eess aaqquueellllaa qquuee ppuueeddee rreedduucciirrssee 
aa llaa ffoorrmmaass aaxx++bb>>oo óó aaxx++bb<<00
EJEMPLOS DDEE EECCUUAACCIIOONNEESS DDEE 
PPRRIIMMEERR GGRRAADDOO 
 0011)) 33xx –– 1155 << 00 
33xx << 1155 
xx << 1155//33 
xx << 55 
RReepprreesseennttaacciióónn ggrraaffiiccaa 
oo 
--∞∞ 55 ∞∞ 
CC..SS..::<< --∞∞ ,,55>>
 0022)) 33xx ++ 66 >> 22xx ++ 1122 
33xx –– 22xx >> 1122 -- 66 
xx >> 66 
RReepprreesseennttaacciióónn ggrraaffiiccaa 
oo 
66 
--∞∞ ∞∞ 
CC..SS..::<< 66,,∞∞>>
 0033)) 44xx -- 88 >> 33xx -- 1144 
44xx –– 33xx >> 88 –– 1144 
xx >> --66 
xx << 66 
RReepprreesseennttaacciióónn ggrraaffiiccaa 
--∞∞ oo 
66 
∞∞ 
CC..SS..::<< --∞∞ ,,66>>
04) -- 22xx ++ 33 >> -- 33xx –– 11 
--22xx ++ 33xx >> --11 -- 33 
xx >> --44 
xx << 44 
RReepprreesseennttaacciióónn ggrraaffiiccaa 
--∞∞ ∞∞ oo 
CC..SS.. ::((--∞∞,, 44)) 
44
IINNEECCUUAACCIIOONNEESS DDEE 
SSEEGGUUNNDDOO GGRRAADDOO 
Una inecuación de sseegguunnddoo ggrraaddoo ccoonn uunnaa 
iinnccóóggnniittaa eess aaqquueellllaa qquuee ppuueeddee rreedduucciirrssee aa llaa 
ffoorrmmaa ::aaxx22++bbxx++cc>>oo óó aaxx22++bbxx++cc<<oo 
SSiieennddoo aa≠≠00yy ppoossiittiivvoo ..ssii ffuueerraa nneeggaattiivvoo ssee 
mmuullttiipplliiccaa aammbbooss nnúúmmeerrooss ppoorr ((--11)) ppaarraa 
hhaacceerrlloo ppoossiittiivvoo ,,ccoonn lloo ccuuaall ssee ccaavviiaa ddee 
sseennttiiddoo aa llaa ddeessiigguuaallddaadd
EEJJEEMMPPLLOOSS EECCUUAACCIIOONNEESS DDEE 
SSEEGGUUNNDDOO GGRRAADDOO 
11)) xx22 −− 66xx ++ 88 >> 00 
XX --44==--44XX 
XX --22==--22XX 
--66XX 
PPoorr ppuunnttooss ccrrííttiiccooss 
((XX--44))((XX--22))>>00 
XX>>44 VV XX>>22 
++ -- ++ 
OO 
22 
OO 
44 
--∞∞ ∞∞ 
CC..SS.. ::<<--∞∞ ,,22>> UU <<44,, ∞∞>>
22)) xx22 ++ 22xx ++11 >> 00 
XX 11==XX 
XX 11==XX 
22XX 
PPoorr ppuunnttooss ccrrííttiiccooss 
((XX++11))((XX++11))>>00 
((xx++11))22 >>00 
CC..SS:: RR ––((--11))
INECUACIONES PPOOLLIINNÓÓMMIICCAASS 
UUnnaa eexxpprreessiióónn ddee llaa ffoorrmmaa ::,, ssiieennddoo uunn 
eenntteerroo nnoo nneeggaattiivvoo;; ssoonn nnúúmmeerrooss rreeaalleess oo 
ccoommpplleejjooss ssee llaammaa ppoolliinnoommiioo ddee 
ccooeeffiicciieenntteess eenn ââ (( oo eenn cc )) yy ccoonn 
iinnddeetteerrmmiinnaaddaa xx..
EEJJEEMMPPLLOOSS 
11)) 22xx33--33xx22--1111xx++66>>00 PPoorr ppuunnttooss ccrrííttiiccooss 
PPoorr RRuuffffiinnii ((xx--33))((xx--11))((xx++22))>>00 
22 --33 --1111 66 xx==33,,xx==11,,xx==--22 
33 66 99 --66 GGrrááffiiccaammeennttee 
22 33 --22 00 
((xx--33))((22xx22++33xx--22))>>00 
xx --11==--xx 
xx 22==44xx 
33xx 
+ - + - 
O 
-2 
O 
1 
O 
3 
--∞∞ ∞∞ 
C.S: < --∞∞,,--22>> UU <<11,,33>>
22)) XX33--22XX22--88XX>>00 
XX ((XX22--22XX--88))>>OO 
XX --44==--44XX 
XX 22== 22XX 
--22XX rreepprreesseennttaacciióónn ggrraaffiiccaa 
PPoorr ppuunnttooss ccrrííttiiccooss 
XX((xx--44))((XX++22))>>00 
XX==00,,XX==44 yy xx==--22 
+ - + - 
--∞∞ ∞∞ 
CC..SS..::<<--∞∞,,--22>>UU <<00,,44>> 
O 
4 
O 
0 
O 
-2

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Dia del profesor
 

Inecuaciones

  • 1. IINNEECCUUAACCIIOONNEESS IINNTTEEGGRRAANNTTEESS:: • DDiieeggoo MMaarrttiinn SSaallaazzaarr DDeellggaaddoo • OOssccaarr AAbbeellaarrddoo CCaarriittaa CCoohhaaiillaa • AAllddoo CCoollqquueeppiissccoo MMaanncciillllaa • JJuulliioo CCeessaarr PPaauuccaarr TToorrrreess • KKeevviinn CCoossíí CChhuurrqquuii
  • 2. CCOONNCCEEPPTTOO  UN SISTEMA DE INECUACIONES DDEE UUNNAA VVAARRIIBBAALLEE EESSTTAA FFOORRMMAADDOO PPOORR UUNN CCOONNJJUUNNTTOO DDEE IINNEECCUUAACCIIOONNEESS DDEE LLAAMMIISSMMAA VVAARRIIAABBLLEESS..  SSUU SSOOLLUUCCIIOONN EESS EELL CCOONNJJUUNNTTOO DDEE NNUUMMEERROOSS RREEAALLEESS QQUUEE VVEERRIIFFIICCAANN,, AA LLAA VVEEZZ,, TTOODDAASS LLAASS IINNEECCUUAACCIIOONNEESS.. PPAARRAA HHAALLLLAARRLLAASS,, SSEE RREESSUUEELLVVEE PPOORR SSEEPPAARRAADDOO CCAADDAA UUNNAA DDEE LLAASS IINNEECCUUAACCIIOONNEESS,, YY DDEESSPPUUEESS SSEE CCOONNSSIIDDEERRAANN LLAASS SSOOLLUUCCIIOONNEESS CCOOMMUUNNEESS
  • 3.  EEss uunnaa eexxpprreessiióónn mmaatteemmááttiiccaa llaa ccuuaall ssee ccaarraacctteerriizzaa ppoorr tteenneerr llooss ssiiggnnooss ddee ddeessiigguuaallddaadd.. SSiieennddoo uunnaa eexxpprreessiióónn aallggeebbrraaiiccaa nnooss ddaa ccoommoo rreessuullttaaddoo uunn ccoonnjjuunnttoo eenn eell ccuuaall llaa vvaarriiaabbllee iinnddeeppeennddiieennttee ppuueeddee ttoommaarr eell vvaalloorr ccuuaalleessqquuiieerraa ddee eessee ccoonnjjuunnttoo ccuummpplliieennddoo eessttaa ddeessiigguuaallddaadd.. AA eessttee ccoonnjjuunnttoo ssee llee ccoonnooccee ccoommoo IInntteerrvvaalloo..
  • 4. IINNEECCUUAACCIIOONNEESS DDEE PPRRIIMMEERR GGRRAADDOO UUnnaa eeccuuaacciióónn ddee pprriimmeerr ggrraaddoo ccoonn uunnaa iinnccóóggnniittaa eess aaqquueellllaa qquuee ppuueeddee rreedduucciirrssee aa llaa ffoorrmmaass aaxx++bb>>oo óó aaxx++bb<<00
  • 5. EJEMPLOS DDEE EECCUUAACCIIOONNEESS DDEE PPRRIIMMEERR GGRRAADDOO  0011)) 33xx –– 1155 << 00 33xx << 1155 xx << 1155//33 xx << 55 RReepprreesseennttaacciióónn ggrraaffiiccaa oo --∞∞ 55 ∞∞ CC..SS..::<< --∞∞ ,,55>>
  • 6.  0022)) 33xx ++ 66 >> 22xx ++ 1122 33xx –– 22xx >> 1122 -- 66 xx >> 66 RReepprreesseennttaacciióónn ggrraaffiiccaa oo 66 --∞∞ ∞∞ CC..SS..::<< 66,,∞∞>>
  • 7.  0033)) 44xx -- 88 >> 33xx -- 1144 44xx –– 33xx >> 88 –– 1144 xx >> --66 xx << 66 RReepprreesseennttaacciióónn ggrraaffiiccaa --∞∞ oo 66 ∞∞ CC..SS..::<< --∞∞ ,,66>>
  • 8. 04) -- 22xx ++ 33 >> -- 33xx –– 11 --22xx ++ 33xx >> --11 -- 33 xx >> --44 xx << 44 RReepprreesseennttaacciióónn ggrraaffiiccaa --∞∞ ∞∞ oo CC..SS.. ::((--∞∞,, 44)) 44
  • 9. IINNEECCUUAACCIIOONNEESS DDEE SSEEGGUUNNDDOO GGRRAADDOO Una inecuación de sseegguunnddoo ggrraaddoo ccoonn uunnaa iinnccóóggnniittaa eess aaqquueellllaa qquuee ppuueeddee rreedduucciirrssee aa llaa ffoorrmmaa ::aaxx22++bbxx++cc>>oo óó aaxx22++bbxx++cc<<oo SSiieennddoo aa≠≠00yy ppoossiittiivvoo ..ssii ffuueerraa nneeggaattiivvoo ssee mmuullttiipplliiccaa aammbbooss nnúúmmeerrooss ppoorr ((--11)) ppaarraa hhaacceerrlloo ppoossiittiivvoo ,,ccoonn lloo ccuuaall ssee ccaavviiaa ddee sseennttiiddoo aa llaa ddeessiigguuaallddaadd
  • 10. EEJJEEMMPPLLOOSS EECCUUAACCIIOONNEESS DDEE SSEEGGUUNNDDOO GGRRAADDOO 11)) xx22 −− 66xx ++ 88 >> 00 XX --44==--44XX XX --22==--22XX --66XX PPoorr ppuunnttooss ccrrííttiiccooss ((XX--44))((XX--22))>>00 XX>>44 VV XX>>22 ++ -- ++ OO 22 OO 44 --∞∞ ∞∞ CC..SS.. ::<<--∞∞ ,,22>> UU <<44,, ∞∞>>
  • 11. 22)) xx22 ++ 22xx ++11 >> 00 XX 11==XX XX 11==XX 22XX PPoorr ppuunnttooss ccrrííttiiccooss ((XX++11))((XX++11))>>00 ((xx++11))22 >>00 CC..SS:: RR ––((--11))
  • 12. INECUACIONES PPOOLLIINNÓÓMMIICCAASS UUnnaa eexxpprreessiióónn ddee llaa ffoorrmmaa ::,, ssiieennddoo uunn eenntteerroo nnoo nneeggaattiivvoo;; ssoonn nnúúmmeerrooss rreeaalleess oo ccoommpplleejjooss ssee llaammaa ppoolliinnoommiioo ddee ccooeeffiicciieenntteess eenn ââ (( oo eenn cc )) yy ccoonn iinnddeetteerrmmiinnaaddaa xx..
  • 13. EEJJEEMMPPLLOOSS 11)) 22xx33--33xx22--1111xx++66>>00 PPoorr ppuunnttooss ccrrííttiiccooss PPoorr RRuuffffiinnii ((xx--33))((xx--11))((xx++22))>>00 22 --33 --1111 66 xx==33,,xx==11,,xx==--22 33 66 99 --66 GGrrááffiiccaammeennttee 22 33 --22 00 ((xx--33))((22xx22++33xx--22))>>00 xx --11==--xx xx 22==44xx 33xx + - + - O -2 O 1 O 3 --∞∞ ∞∞ C.S: < --∞∞,,--22>> UU <<11,,33>>
  • 14. 22)) XX33--22XX22--88XX>>00 XX ((XX22--22XX--88))>>OO XX --44==--44XX XX 22== 22XX --22XX rreepprreesseennttaacciióónn ggrraaffiiccaa PPoorr ppuunnttooss ccrrííttiiccooss XX((xx--44))((XX++22))>>00 XX==00,,XX==44 yy xx==--22 + - + - --∞∞ ∞∞ CC..SS..::<<--∞∞,,--22>>UU <<00,,44>> O 4 O 0 O -2