1.

Find n if the given value of x is the nth term of the given A.P.25, 50, 75, 100, ; x = 1000

Answer»

Given A.P. 25, 50, 75, 100, …… ,1000

Here, a = 25 d = 50 – 25 = 25

Last term (nth term) = 1000

We know that an = a + (n – 1)d

⇒ 1000 = 25 + (n-1)25

1000 = 25 + 25n – 25

n = 1000/25

n = 40



Discussion

No Comment Found