Question

Find the sum of the first 125 positive even whole numbers.

Answer 1

if 0 is excluded;

then we have 2,4,6,8..forming an AP.

then 1st term A = 2 , common difference D = 2, and the number of terms N = 125.

find the last term L = A + (N-1)D with A = 2, D = 2, N = 125. and tell me the answer.

Answer 2

250

Answer 3

ok. so A = 2 and L = 250.

Use the formula Sum S = N X (A+L) / 2 with N = 125, A = 2, L = 250; write down d ans.

Answer 4

15750