If in an A.P., first term is 20, common difference is 2 and nth term is 42, then find sum up to n terms.

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answerhappygod
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If in an A.P., first term is 20, common difference is 2 and nth term is 42, then find sum up to n terms.

Post by answerhappygod »

a) 12
b) 42
c) 352
d) 372
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