Which term of the Arithmetic Progression -7, -12,-82? Is-100 any term – InterviewSolution

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Which term of the Arithmetic Progression -7, -12,-82? Is-100 any term of the A.P.? Give reason for your anwer-17,-22,-will be

Answer»

Tn=a+(n-1)d-82= -7+(n-1)(-5)-82=-2-5n5n=80n=16-82 is the 16th term

-100=-7+(n-1)(-5)5n=98n=19.6since n is not a natural number, so -100 is not the term of the given AP

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