Question

The first negative term of the following AP will be
993, 986, 979, 972,...

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Answer 1

Answer:

n = 143rd term.

Explanation:

A.P 993, 986, 979, 972,...

a= 993

d= -7

Let first negative term be −1

−1 = a+(n−1)d

⇒ −1 = 993+(n−1)−7

⇒ -7(n-1) = -1-993

⇒ n-1 = 994/7

= n = 142+1

= n = 143rd term.