Question

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

Answer 1

150 =n/2 (a+l)

150=n/2( -4+29)

150=n/2×25

n=12

29 = -4+ 11d

33=11d

D is equal to 3

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