Math Problem Statement

Which expression is equal to 4^5 × 4^(-7) ÷ 4^(-2)?

Solution

The given expression is:

45×47÷424^5 \times 4^{-7} \div 4^{-2}

We will solve it using the properties of exponents.

  1. Multiplication of powers with the same base: When multiplying terms with the same base, you add the exponents:

45×47=45+(7)=424^5 \times 4^{-7} = 4^{5 + (-7)} = 4^{-2}

  1. Division of powers with the same base: When dividing terms with the same base, you subtract the exponents:

42÷42=42(2)=404^{-2} \div 4^{-2} = 4^{-2 - (-2)} = 4^0

Since 40=14^0 = 1, the correct answer is 404^0.

The correct option is 404^0.

Would you like further details or have any questions?

Here are 5 related questions to expand on this:

  1. What is the rule for multiplying exponents with the same base?
  2. How do you simplify division of exponents with the same base?
  3. What is the value of any number raised to the power of 0?
  4. Can you simplify 43×454^3 \times 4^{-5}?
  5. How do negative exponents work in mathematical expressions?

Tip: Remember that when exponents are added or subtracted during multiplication or division, you can quickly simplify expressions with the same base!

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Math Problem Analysis

Mathematical Concepts

Exponents
Laws of Exponents

Formulas

a^m × a^n = a^(m+n)
a^m ÷ a^n = a^(m-n)
a^0 = 1

Theorems

Multiplication of Exponents
Division of Exponents
Zero Exponent Rule

Suitable Grade Level

Grades 7-9