How many term of ap 5,8,11... add upto 670 – InterviewSolution

1.

How many term of ap 5,8,11... add upto 670

Answer»

here,

A.P = 5,8,11........ 670

a = 5

d = 3

Tn = a+(N-1)d

670= 5+(n-1)3

670= 5+3n-3

670= 2+ 3n

670-2= 3n

668=3n

668/3= n

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