Question

11. In An AP If d = -4, n = 7 a, = 4 then find 'a'.​

Answer 1

Tn = a + (n-1)d
Given
a=4
d= -4
n=7

Tn = 4 + (7-1) * -4


Tn = 4 - 6*4

Tn = 4 - 24

Tn = -20