Question

IfS=1²-2²+3²-4² upto n terms and n is even that S equals _______

n(n+1)/2

n(n-1)/2

-n(n+1)/2

-n(n-1)/2​

Answer 1

Let's solve your equation step-by-step.

s=12−22+32−42

Step 1: Simplify both sides of the equation.

s=12−22+32−42

s=1+−4+9+−16

s=(1+−4+9+−16)(Combine Like Terms)

s=−10

s=−10

Answer:

s=−10