AP Precalculus · Unit 2: Exponential and Logarithmic Functions · Lesson 2.4

Guided Practice: Exponential Function Manipulation

🧭 Guided Practice
Pick an essential knowledge statement, then step through worked examples one move at a time.
2.4.A.1Concept

The product property for exponents states that bmbn = bm+n. Graphically, this property implies that every horizontal translation of an exponential function, f(x) = bx+k, is equivalent to a vertical dilation, f(x) = bx+k = bxbk = abx, where a = bk.

ExampleShift left 3 = stretch by 81 / 3

Rewrite f(x) = 2x+3 in the form abx, then check the two forms at x = 2.

-3-2-101205101520253035xf(x)

Try it on paper first, then reveal each step to check your work.

Step 1 — Split the exponent
Use the product property backward: 2x+3 = 2x·23.
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