Question

In an A.P., if a=15, d=-3 , and an=0,then find the value of n.

Answer 1

Step-by-step explanation:

an=a+(n-1)d

n={(an-a)/d} +1

n={0-15/-3}+1

= 5+1

= 6

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Answer 2

Answer:

N= - 15

Step-by-step explanation:

Because -15 + 15 = 0 and A = 15 and an. =0