Question

1/6 + 1/12 + 1/20 + ... + 1/9900

Answer 1

Ans

1/6+1/12+1/20+⋯+1/9900

=1/2⋅3+1/3⋅4+1/4⋅5++⋯+199⋅100

=(1−12)+(12−13)+(13−14)+(14−15)+(15−16)+⋯+(199−1100)

=1−1100

=99/100

Explanation:

PLZ MARK ME AS A BRAINLIST