Question

In an ap , if the common difference (d) =4 , and the seventh term (a7) is 4, the find fist term

Answer 1

d = 4

A7 = 4

=> a + 6d = 4

=> a + 6(4) = 4

=> a + 24 = 4

=> a = 4 - 24

=> a = - 20

First term = - 20

Answer 2

d= 4
a7 = a + 6d = 4
= a+ 6(4) = 4
= a + 24 = 4
= a = 4-24 = -20
= a = -20.