Pedagogy of Mathematics - Part II (Numbers and Sequence - Ex 2.4), Numbers and Sequence, Maths, IX std Maths, Samacheerkalvi maths, II year B.Ed., Pedagogy, Mathematics, sequences, definitions of sequences, sequence as a function,
2d. Pedagogy of Mathematics - Part II (Numbers and Sequence - Ex 2.4)
1. PEDAGOGY OF
MATHEMATICS – PART II
BY
Dr. I. UMA MAHESWARI
Principal
Peniel Rural College of Education,Vemparali,
Dindigul District
iuma_maheswari@yahoo.co.in
14. Solution:
(i) 8, 24, 72…
In an arithmetic sequence a = 8,
d = t1 – t1 = t3 – t2
= 24 – 8 72 – 24
= 16 ≠ 48
So, it is not an arithmetic sequence. In a
geometric sequence
15. ⇒ 3 = 3
∴ It is a geometric sequence
∴The nth term of a G.P is tn = arn-1
∴ t4 = 8 × 34-1
= 8 × 33
= 8 × 27
= 216