Question

An AP the first term is is -4 the last term is 29 and the sum of all the the terms is 150 find its common difference

Answer 1

hey mate here is ur

S=n/2[2a+(n-1)d]

S=n/2[-8+(n-1)d]--(1)

29=-8+(n-1)d

37=(n-1)d

substitute in (1)

150=n/2[-8+37]

300=29n

n=10(approx)

37=9d

d=37/9.

hope it helps you.

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