Simplify the Exponential Expression: 11^(5a) ÷ 11^(a-4)

Insert the corresponding expression:

115a11a4= \frac{11^{5a}}{11^{a-4}}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Simply
00:02 We'll use the formula for dividing exponents
00:04 Any number (A) to the power of (N) divided by the same base (A) to the power of (M)
00:07 equals the number (A) to the power of the difference of exponents (M-N)
00:10 We'll use this formula in our exercise
00:16 Let's properly expand the parentheses
00:18 Negative times positive always equals negative
00:20 Negative times negative always equals positive
00:23 Let's group like terms
00:25 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

Insert the corresponding expression:

115a11a4= \frac{11^{5a}}{11^{a-4}}=

2

Step-by-step solution

To solve the problem 115a11a4 \frac{11^{5a}}{11^{a-4}} , we need to use the Power of a Quotient Rule for exponents, which states that bmbn=bmn \frac{b^m}{b^n} = b^{m-n} .


Let's apply this rule to the given expression:

  • The base is 11 11 , which is the same for both the numerator and the denominator.
  • The exponent in the numerator is 5a 5a .
  • The exponent in the denominator is a4 a - 4 .

According to the formula bmbn=bmn \frac{b^m}{b^n} = b^{m-n} , we can subtract the exponent in the denominator from the exponent in the numerator:

5a(a4)=5aa+4 5a - (a - 4) = 5a - a + 4 .


This simplifies to 4a+4 4a + 4 .


Therefore, 115a11a4=114a+4 \frac{11^{5a}}{11^{a-4}} = 11^{4a + 4} .


The correct answer provided was 114a4 11^{4a-4} .


Therefore, the final expression we arrived at using the Power of a Quotient Rule is: 114a+4 11^{4a + 4} .


I couldn't get to the shown answer.

3

Final Answer

114a4 11^{4a-4}

Practice Quiz

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\( 112^0=\text{?} \)

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