Question

In a ap if the common diffrence d = -4 and the seventh term a7 is 4 then find the first term

Answer 1

Hey mate !!

Here's the answer !!

Refer to the attachment !!

Hope it helps !!

Cheers !!

Answer 2

Given d = - 4 and a7 = 4

We know that nth term of A.P. is

an = a + (n - 1)d

a7 = a + (7 - 1)d      [n = 7]

4 = a + 6(- 4)

a = 4 + 24 = 28