Question

check whether -150 is term of an Ap 11,8,5,2,.....​

Answer 1

Answer:

-150 = 11+(n-1) × -3

-150= 11+3n-3

-150-11= 3n-3

Step-by-step explanation:

-153. /3 = 3n

-51 / 3= n

n= 17 th term of the given Ap

so , -150 is the term of Ap

Answer 2

let as assume -150 os nth term of ap

and a=11 ,d=8-11 = -3

by using formula an=a+(n-1)×d

-150= 11+( n-1 )×-3

-150 = 11 -3n +3

-150=14-3n

-150-14 =-3n

-164 = -3n

n= -164/-3

n=54.66666

-150 is not a term in AP