Question

is -156 a term of the AP 17, 14, 11, 8,.......?

Answer 1

a= 17

d= - 3

An= -156

n= ?

FORMULA;

An= a+ (n-1)d

-156= 17+ (n-1)-3

-156-17= (n-1)-3

(n-1)-3 = -173

(n-1)= -173/-3

(n)= 57.667+1

n= 58.667

AND HENCE 156 IS NOT A TERM OF THE GIVEN AP.