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Question

Find the nth term of the AP with ‘a’ as first term and ‘d’ as common difference.


A

a + (n+1)d

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B

a + nd

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C

a + (n-1)d

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D

a + 2nd

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Solution

The correct option is C

a + (n-1)d


Common difference = Difference between any term and its preceding term.

In the given AP,

1st term = a,
2nd term = a+d = a + (2-1)d,
3rd term = a+2d = a + (3-1)d, ..
nth term = a + (n-1)d


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