If n is positive, which of the following is equal to

[CurtisVincentBorns]

If n is positive, which of the following is equal to

1/(SQRT(N+1) - SQRT(N))

A. 1
B. SQRT(2N+1)
C. (SQRT(N+1))/(SQ(N))
D. SQRT(N+1)-SQRT(N)
E. SQRT(N+1)+SQRT(N)

So I am having problems with these more advance exponents and roots questions.

I started off by multiplying the equation by the conjugate
SQRT(N+1)+SQRT(N)

I solved the equation through and got stuck at:

(SQRT(N+1)+SQRT(N))/((N+1)-(N))

Apparently the answer is E
I just dont know how to get from
(SQRT(N+1)+SQRT(N))/((N+1)-(N))
to
SQRT(N+1)+SQRT(N)

[tim]

(N+1)-(N) = 1, so the denominator is just 1 and therefore the answer is equivalent to the numerator..

Note to other students reading this thread: the problem and steps described above are missing A LOT of required parentheses, so please don't interpret any of the calculations literally..

[CurtisVincentBorns]

(N+1)-(N) = 1, so the denominator is just 1 and therefore the answer is equivalent to the numerator..

Wow, haha thanks a lot...guess I was over thinking it

Note to other students reading this thread: the problem and steps described above are missing A LOT of required parentheses, so please don't interpret any of the calculations literally..

Sorry about that I've added a few in

[tim]

thanks Curtis; the parentheses all look correct now..