Question

Is -150 a term of the AP 11, 8, 5, 2?

Answer 1

Tn = - 150

= a + ( n - 1 ) d = - 150

= 11 + ( n - 1 ) × ( - 3 ) = 150

= ( n - 1 ) * -3 = 150 - 11

= n - 1 = 139 / -3

n = - 139 / 3 + 1

N can't be fraction.

Hence, ans. no

Answer 2

no, 150 is not a term of ap 11,8,5,2.