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In an ap the first term is -4 the last term is 29 and the sum of all its terms is 150. find its common difference

 

ap = arithmetic progression

 Mar 11, 2020
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N/2 *[2*-4 + D*(N - 1)] =150, 

[29 - -4] / D + 1  =N, solve for N, D

 

D =3 and N =12

 Mar 11, 2020

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