Math Problem Statement

If f(x-2) = 3x - 5 for all values of x, which of the following is the expression for f(x)? A) f(x) = 3x - 1, B) f(x) = 3x + 1, C) f(x) = 3x + 2, D) f(x) = 3x + 3.

Solution

The question states:

If f(x2)=3x5f(x-2) = 3x - 5 for all values of xx, which of the following is the expression for f(x)f(x)?


Step 1: Rewrite the equation for f(x)f(x)

The goal is to express f(x)f(x). The given function is f(x2)=3x5f(x-2) = 3x - 5. Substitute xx with t+2t + 2, so x2=tx - 2 = t, making x=t+2x = t + 2.

Substitute x=t+2x = t + 2 into the given function: f(t)=3(t+2)5.f(t) = 3(t + 2) - 5.


Step 2: Simplify the expression

Simplify f(t)f(t): f(t)=3t+65,f(t) = 3t + 6 - 5, \

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Math Problem Analysis

Mathematical Concepts

Function Transformation
Algebraic Substitution

Formulas

Function transformation: f(x-h) ↔ f(x) with substitution

Theorems

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Suitable Grade Level

Grade 8-10