Math, asked by brainlylover77, 11 months ago

Answer me this question step by step.

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Answered by athulmnair

1

this question is solved according to arithematic progression

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brainlylover77: can we use ; sn = n/2 ( 2a+(n-1)d)

athulmnair: no

brainlylover77: ok

Answered by Namiiiiiita

1

Step by step explanation...!

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