Question

Find K if given value of x is K term of given AP first 25, 50, 75, on X is equals to thousand

Answer 1

1000=a+(k-1)d

A = 25, common difference (d) =25

So 1000= 25+(k-1)25

975/25=k+1

K =39+1 = 40

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Answer 2

A=25,c.d=25

So, 1000=25+(K-1)25

975/25=k+1

K=39+1=40