Question

find the seventeenth term of A.P 2,7,12.....

Answer 1

A.P. 2,7,12,...

The first term is, a = 2

the common difference, d = 7-2 = 5

The seventeenth term of A.P. is

a17 = a+16d = (2)+16 (5) = 2+80 = 82

The seventeenth term of an AP is 82

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Answer 2

Given -- AP = 2,7,12...........
a = 2, a2 = 7, d = a2 - a = 7 - 2 = 5
an = a+(n-1)d
a17 = a+(17-1)d
a17 = 2 + 16×5
a17 = 2 + 80
a17 = 82
Therefore 17th term is 82.....
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