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Question

The sum up to n terms of an AP with first term a, last term l and common difference d is


A

n2(2a+(n1)d)

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B

n(2a+(n1)d)

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C

n2(a+l)

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D

n2(a+l)d

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Solution

The correct options are
A

n2(2a+(n1)d)


C

n2(a+l)


The sum up to n terms of an AP with first term a and common difference d is n2(2a+(n1)d) and the sum up to n terms of an AP with first term a and last term l is n2(a+l).

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