Find the number of terms in each of the following APs :1) 18, 15 1/2, – InterviewSolution

1.

Find the number of terms in each of the following APs :1) 18, 15 1/2, 13,....,-47

Answer»

Step-by-step EXPLANATION:

tn=a+(n-1)d

-47=18+(n-1)-3

-47=-18-3n+3

-47=-15-3n

-47+15+3n=0

-32+3n

n=32/3

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