calculus
posted by Vana .
Evaluate the following limit:
lim x > negative infinity
9 square root over x^21
divided by
x + 4

I assume you want
Lim 9 sqrt(x^21)/(x+4)
x> inf
When x becomes very large and negative, the numerator approaches 9x (assuming you take only the positive square root) and the denominator approaches x. The fraction therefore approaches 9.