3 : 4 : 5 = 3² : 4² : 5² = 9 : 16 : 25
The answer is B.
Hope this helps.
(2+n)-4, i think this is the answer
Well,
Given that
,
We can rewrite the equation like,

Now use,
which implies that 
That means that,

By def
therefore 
So the fraction now looks like,

Which is equal to the identity,

Hope this helps.
r3t40
Donuts because I really like them