Unit 2

Unit 2 Inverses & Exponential Functions

Modules 4.5-4.7

Skip lesson 1 and 2

Math 2 Module Piecewise Functions.pdf

Unit 3 Inverses and Logs.pdf

Help videos and Practice

Intro to inverse functionsSal explains what inverse functions are. Then he explains how to algebraically find the inverse of a function and looks at the graphical relationship between inverse functions.

Intro to logarithmsSal explains what logarithms are and gives a few examples of finding logarithms.

Exponential growth & decay word problemsTwo word problem examples: one about a radioactive decay, and the other the exponential growth of a fast-food chain.

Solving exponential equations using logarithms: base-2We can use logarithms to solve *any* exponential equation of the form a⋅bᶜˣ=d. For example, this is how you can solve 3⋅10²ˣ=7: 1. Divide by 3: 10²ˣ=7/3 2. Use the definition of logarithm: 2x=log(7/3) 3. Divide by 2: x=log(7/3)/2 Now you can use a calculator to find the solution of the equation as a rounded decimal number

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