Question

The first term of an A.P. is 5, the common difference is 3 and the last term is 80; find the number of terms.

Answer 1

Answer:

26

Step-by-step explanation:

Here

a=5,d=3,an=80

an=a+(n-1)d

80=5+(n-1)3

(n-1)3=75

n-1=25

n=26

Therefore the AP has 26 terms.

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