Question

check whether -150 is a term of the ap 3,15,27,39

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Answer 1

Answer:

No

Step-by-step explanation:

a = 3

d = (15-3) = 12

a+(n-1)d = -150

3+(n-1)12 = -150

12n-12 = -150-3

12n = -153 + 12

n = -141/12

here -141 is not completely divisible by 12 hence -150 is not in the AP given above

Answer 2

No, -150 is not the term of AP 3,15,27,39...

Solution is.....

a = 3

d = 12

a+(n-1)d = -150

3+(n-1)12 = -150

(n-1)12 = -150-3

12n-12 = -153

12n = -153+12

12n = -141

n = -141/12

☆ Hence, -150 is not the term of this AP.