Anybody good with Calculus?

hey, i notice that u HAVE to have a calculator to do this problem, quite a trick problem here
The first half of the problem (1/h) comes out to be approaching infinity
the second half of the problem approaches zero.
at first glance, a really big number multiplied by zero is zero.
but then i noticed the 2nd part isn't zero, but it approaches zero. so it's actually a really big number multiplied by a really small number.
And it just so happens, the really big number is exactly 10 times bigger than the small number. thus the answer is 10. *smacks myself for answer earlier*