Question

the 9 th term of ap is 5 times the 2 term and 12 term is 7 more than twice 5term find ap​

Answer 1

Answera9=7*a2

a12=5a3+2

That means,

a9=(a+d)7

a12=5(a+2d)+2

That means,

a+8d=7a+7d, d=6a

a+11d=5a+10d+2,

d=4a+2,

2a=2,

a=1//

d=6a=6//

So first term is 1

Hope it helps u