### Home > PC > Chapter 8 > Lesson 8.1.2 > Problem 8-30

8-30.

Recall that

= ∞ when *a*> 1. Find the following limits. Homework Help ✎, where *a*(*x*) = 3^{x}, where *b*(*x*) = 3^{x}^{ }− 6(2)^{x}, where *c*(*x*) = −5^{x}, where *d*(*x*) = −5^{x}^{ }+ 10(4)^{x}

Sketch a graph.

What is the dominant term?

Sketch a graph.

What is the dominant term?

−5^{x}

So the answer is −∞.