exam Maths Puzzle Numerical Ability

simplify

3
over
4
over
4
over
5
A)16/15
B)15/16
C)5/3
D)3/5

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exam Other Question

I have asked a couple of questions can some one please answer them i not sure why no one has not answered them PLEASE HELP ME PLEASE I TRULY NEED SOME HELP THANK YOU THANK YOU!!!!! find the LCD of
1 1
------- + ------
1 - x^2 x - 1