Question

write the sum of first n even numbers.​

Answer 1

Step-by-step explanation:

2+4+6+…upto 50 terms

Sum of n numbers in AP = (n/2)(2a+(n-1)d)

Here a=2, n=50, d=2

So Sum of 50 even numbers is = (50/2)(2*2 + (50–1)2) = 2550.

So the answer is 2550.

Answer 2

Step-by-step explanation:

Sn=n(n-1)/2

this is the answer

for ur question it's a formula