1. i a f(a) b f(b)
1 -3 -4 -2 7
2 -3 -4 -2.5 3.125
3 -3 -4 -2.75 0.015625
4 -2.875 -1.87304688 -2.75 0.015625
5 -2.8125 -0.8996582 -2.75 0.015625
6 -2.78 -0.416552 -2.75 0.015625
7 -2.765 -0.19882213 -2.75 0.015625
8 -3 -4 -2.9921875 -3.8598628
9 -3 -4 -2.99609375 -3.92980951
10 -3 -4 -2.998 -3.96403199
11 -3 -4 -2.999 -3.982008
12 -3 -4 -2.9995 -3.991002
13 -3 -4 -2.99975 -3.9955005
14 -3 -4 -2.9999375 -3.99887503

2. f(a)*f(b) Xr F(Xr) E
-28 -2.5 3.125 909%
-12.5 -2.75 0.015625 435%
-0.0625 -2.875 -1.87304688 -222%
-0.02926636 -2.8125 -0.8996582 -112%
-0.01405716 -2.78125 -0.43484497 -59%
-0.00650862 -2.765 -0.19882212 -27%
-0.0031066 -2.7575 -0.09118948 796%
15.4394512 -2.99609375 -3.92980951 7%
15.719238 -2.99804688 -3.96487426 3%
15.856128 -2.999 -3.982008 2%
15.928032 -2.9995 -3.991002 1%
15.964008 -2.99975 -3.9955005 0%
15.982002 -2.999875 -3.99775012 0%
15.9955001 -2.99996875 -3.99943751 #DIV/0!

3. i a f(a) b f(b)
1 -3 #NUM! -2 #NUM!
2 -3 #NUM! -2 #NUM!
3 #NUM! #NUM!
4 #NUM! #NUM!
5 #NUM! #NUM!
6 #NUM! #NUM!
7 #NUM! #NUM!
8 #NUM! #NUM!
9 #NUM! #NUM!
10 #NUM! #NUM!

4. c f© E