Question

ninth term of an AP is equal to Sevetimes the second term and twelfth term exceeds five times the third term by 2find the first term and (common difference

Answer 1

put a = 1 in equation ( 1 ) , we get

d = 6

Therefore ,

first term = a = 1 ,

common difference = d = 6

I hope this helps you.

:)

Answer 2

Hello..

Let us take common difference be a and d
A.T.Q
T9=7t2
A+8d=7a+7d
D=6a.. eq.1
T12 = 5t3 + 2
a+11d=5a+10d+2
d=4a+2
6a=4a+2(eq.1)
2a=2
a=2/2
A=1