Question

Hii .....

I don't understand maths problem...how to solve the sums

Answer 1

I do not understand your question completely if you are looking for summation, here is an example.

[[ ∑i=1n[6+2(i−1)]= 6n+2∑i=1n−1i∑i=1n[6+2(i−1)]=6n+2∑i=1n−1i. ]] - Image is given

You can simplify further and remove the summation completely; then that is equal to 4n+1104n+110. From there, you can solve for n as you normally would​​​​​​​