Question

Pls solve 8th question with step by step solution

Answer 1

Explanation:

Given that 4th term and 17th term in ratio 1:5.

(a+3d)/(a+16d) = 1/5

5a + 15d = a + 16d

d = 4a ---- (1).

We know that sum of n terms = n/2(2a+(n-1)*d)

the sum of 7 terms = 7/2(2a + 6d) = 182

= 7(a + 3d) = 182

(a + 3d) = 26.

(a + 3(4a)) = 26 (from (1)

a + 12a = 26

a = 2

Substitute a = 2 in (1)

d = 8.

The Ap = 2,10,18,26,34....

hope it helps

Answer 2

Explanation:

so , AP is 2,10,18,26, ........