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Question

If the first term of an AP is 3 and the common difference is 5, the nth term of the AP is .


A
5n+2
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B
3n+4
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C
3n4
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D
5n2
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Solution

The correct option is D 5n2
an=a+(n1)d
where
a = first term
d = common difference
an=nth term
Given, a = 3, d = 5
an=3+(n1)5
an=3+5n5
an=5n2

Mathematics

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