Math Problem Statement

Given f(x)= 2 square root x + 7, solve f(x)=10

Solution

We are given the function:

f(x)=2x+7f(x) = 2\sqrt{x} + 7

To solve f(x)=10f(x) = 10, set the function equal to 10:

2x+7=102\sqrt{x} + 7 = 10

Step 1: Subtract 7 from both sides

2x=1072\sqrt{x} = 10 - 7

2x=32\sqrt{x} = 3

Step 2: Divide both sides by 2

x=32\sqrt{x} = \frac{3}{2}

Step 3: Square both sides to eliminate the square root

x=(32)2x = \left(\frac{3}{2}\right)^2

x=94x = \frac{9}{4}

Thus, the solution is:

x=94x = \frac{9}{4}

Would you like any further clarification?

Here are 5 related questions to explore:

  1. What is the domain of the function f(x)=2x+7f(x) = 2\sqrt{x} + 7?
  2. How do you solve f(x)=15f(x) = 15 for the same function?
  3. What happens if you apply the inverse of f(x)f(x) to find f1(10)f^{-1}(10)?
  4. Can f(x)=2x+7f(x) = 2\sqrt{x} + 7 ever be negative? Why or why not?
  5. How would the graph of f(x)f(x) look?

Tip: When solving square root equations, always check for extraneous solutions by substituting your result back into the original equation.

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Math Problem Analysis

Mathematical Concepts

Algebra
Functions
Square Roots

Formulas

f(x) = 2√x + 7
Solving square root equations

Theorems

Basic properties of square root functions

Suitable Grade Level

Grades 9-10