Simplify the Complex Fraction: 1/(X^7/X^6) Step by Step

Complex Fractions with Negative Exponents

1X7X6= \frac{1}{\frac{X^7}{X^6}}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:08 Let's solve this problem together.
00:12 We'll use the formula for dividing powers with the same base.
00:16 When dividing, we keep the base and subtract the exponents.
00:20 Now, let's apply this to our exercise step by step.
00:26 We subtract the exponent in the denominator from the exponent in the numerator.
00:40 Remember, a negative exponent means we flip it between top and bottom.
00:48 Now, let's use this rule in our example.
00:55 And there you have it, the solution!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

1X7X6= \frac{1}{\frac{X^7}{X^6}}=

2

Step-by-step solution

First, we will focus on the exercise with a fraction in the denominator. We will solve it using the formula:

anam=anm \frac{a^n}{a^m}= a^{n-m}

x7x6=x76=x1 \frac{x^7}{x^6}=x^{7-6}=x^1

Therefore, we get:

1x \frac{1}{x}

We know that a product raised to the 0 is equal to 1 and therefore:

x0x1=x(01)=x1 \frac{x^0}{x^1}=x^{(0-1)}=x^{-1}

3

Final Answer

X1 X^{-1}

Key Points to Remember

Essential concepts to master this topic
  • Rule: Simplify denominator first using quotient rule for exponents
  • Technique: Convert division by fraction to multiplication: 1x7x6=1×x6x7 \frac{1}{\frac{x^7}{x^6}} = 1 \times \frac{x^6}{x^7}
  • Check: Verify x1×x=x0=1 x^{-1} \times x = x^0 = 1 confirms reciprocal property ✓

Common Mistakes

Avoid these frequent errors
  • Adding exponents instead of subtracting in denominator
    Don't calculate x7x6=x7+6=x13 \frac{x^7}{x^6} = x^{7+6} = x^{13} ! This uses multiplication rule instead of division. Always subtract exponents when dividing: x7x6=x76=x1 \frac{x^7}{x^6} = x^{7-6} = x^1 .

Practice Quiz

Test your knowledge with interactive questions

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

FAQ

Everything you need to know about this question

Why does dividing by a fraction flip it upside down?

+

Dividing by a fraction is the same as multiplying by its reciprocal. So 1x7x6 \frac{1}{\frac{x^7}{x^6}} becomes 1×x6x7 1 \times \frac{x^6}{x^7} , which simplifies to x1 x^{-1} .

What's the difference between x1 x^{-1} and 1x \frac{1}{x} ?

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They're exactly the same thing! x1 x^{-1} is just the exponential notation for 1x \frac{1}{x} . Negative exponents always mean 'one over' that base raised to the positive exponent.

How do I remember the quotient rule for exponents?

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Think of it as canceling out: x7x6 \frac{x^7}{x^6} means you have 7 x's on top and 6 x's on bottom. After canceling, you're left with 7 - 6 = 1 x on top, so x1=x x^1 = x .

Can I work with the complex fraction without simplifying the denominator first?

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It's much harder that way! Always simplify step by step: first handle x7x6=x \frac{x^7}{x^6} = x , then solve 1x=x1 \frac{1}{x} = x^{-1} . Breaking it into steps prevents mistakes.

Why is the answer x1 x^{-1} and not just x x ?

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Because we have 1 divided by x, not just x! When you have 1x \frac{1}{x} , that's the definition of x1 x^{-1} . The negative exponent shows we're taking the reciprocal.

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