Question

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

Answer 1

Answer:

n = 6.

Step-by-step explanation:

a = 15, d = -3, an = 0, n = ?

an = a + (n - 1)d

15 + (n - 1)-3 = 0

15 - 3n + 3 = 0

18 - 3n = 0

-3n = -18

n = 6.

So 0 is the 6th term of this AP.

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