Math, asked by rishabh1213, 11 months ago

Please help me with this question

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Answered by anjia

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Answer:

A.T.Q. a+d=14 and a+2d=18

On solving a=10 and d= 4

Sum of n terms =n/2( 2a +(n-1)d)

= 51/2(2×10+(51-1)4)

= 5610

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