First term of an ap is twice it's common difference. If the sum of the first two term of the AP is130. Find the first term of the ap.

Question

First term  of an ap is twice it's common difference. If the sum of the first two term of the AP is130. Find the first term of the ap.

oobleck · Answer

a = 2d a + a+d = 130 so, 2a+d = 130 4a+2d = 260 4a+a = 260 a = 52