Question

Write an alp to find the sum of first 75 natural numbers 8086

Answer 1

The numbers follow AP:

1 + 2 + 3 + 4 ............................. 75

with;

a = 1

n = 75

d = 1

We know that:

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

==> 75 / 2 [ 2 + 74 ]

==> 75 / 2 * 76

==> 75 * 38

==> 2850

That's the answer.

Hope it helps you

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