1. Homework Check

2. Skill Check

3. Essential Questions: 1. How do I solve exponential functions. 2
Essential Questions: 1. How do I solve exponential functions? 2. How do I solve logarithmic functions?

4. Change-of-Base Formula
Let a, b, and x be positive real numbers such that a1 and b1.

5. Hit the ln/log button 3 times!!**
Evaluate using the natural logarithms. Round to four decimal places.
**In the TI-36X Pro :
Hit the ln/log button 3 times!!**

6. Steps for solving Equations
Isolate the base.
If you can rewrite to make the same base, do it!
If not,
Rewrite an Exponential Equation in log form.
Rewrite a Logarithmic Equation in exp. Form.
CHECK YOUR ANSWER!!

7. Ex. 1
Storing in Calc as “x” :

8. Ex. 2
Storing in Calc as “x” :

9. Ex. 3
Storing in Calc as “x” :

10. Ex. 4
Storing in Calc as “x” :

11. Ex. 5
Storing in Calc as “x” :

12. Homework
3A.4 Worksheet
(What does a fraction with an exponent mean? A negative power!)