### Home > PC > Chapter 8 > Lesson 8.1.1 > Problem 8-7

8-7.

Find the following limits. Homework Help ✎

, where *a*(*x*) =*x*^{6}, where *b*(*x*) =*x*^{6}− 12*x*^{5}+ 7*x*^{3}− 400, where *c*(*x*) = −3*x*^{7}, where *d*(*x*) = −3*x*^{7}+ 1000*x*+ 48000

∞

When *x* is extremely large, what is the only term that matters for this limit?

−∞

When *x* is extremely large, what is the only term that matters for this limit?