Question
Teanne Shayla S. Francisco Annie says that \( \frac{7}{2}^{2} \) equals \( 1^{3} \) because she can she can divide 7 s and subtract the exponents. Writes an explauation so that Annie will whderstand why she is wrong and how to get the correct answer.
Ask by Park Chadwick. in the Philippines
Nov 21,2024
Upstudy AI Solution
Tutor-Verified Answer
Answer
Annie, \( \frac{7}{2}^{2} \) is not equal to \( 1^{3} \) because you need to apply the exponent to both the numerator and the denominator separately. The correct calculation is \( \frac{7}{2}^{2} = \frac{49}{4} \) and \( 1^{3} = 1 \).
Solution
Hi Annie! Let's take a closer look at the expression \( \frac{7}{2}^{2} \) and see why it doesn't equal \( 1^{3} \).
First, let's break down what \( \frac{7}{2}^{2} \) means. When you see a fraction raised to a power, you can apply the exponent to both the numerator and the denominator. So:
\[
\frac{7}{2}^{2} = \frac{7^{2}}{2^{2}}
\]
Now, let's calculate \( 7^{2} \) and \( 2^{2} \):
- \( 7^{2} = 49 \)
- \( 2^{2} = 4 \)
So, we have:
\[
\frac{7^{2}}{2^{2}} = \frac{49}{4}
\]
Now, let's look at \( 1^{3} \). Any number raised to any power is still that number, and since \( 1 \) raised to any power is still \( 1 \):
\[
1^{3} = 1
\]
Now we can compare the two results:
- \( \frac{7}{2}^{2} = \frac{49}{4} \)
- \( 1^{3} = 1 \)
Clearly, \( \frac{49}{4} \) is not equal to \( 1 \).
The mistake you made was in thinking that you could divide the numbers and subtract the exponents in a way that would lead to \( 1^{3} \). Instead, you need to apply the exponent to both the numerator and the denominator separately.
So, the correct answer is:
\[
\frac{7}{2}^{2} = \frac{49}{4} \quad \text{and} \quad 1^{3} = 1
\]
These two values are not equal. I hope this helps you understand why \( \frac{7}{2}^{2} \) does not equal \( 1^{3} \)!
Answered by UpStudy AI and reviewed by a Professional Tutor
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Beyond the Answer
Hey Annie! Let's break this down in a fun way. When you see \( \frac{7}{2}^{2} \), it's like saying you have \( \frac{7^{2}}{2^{2}} \) after you square it. So, \( 7^{2} = 49 \) and \( 2^{2} = 4 \), making \( \frac{49}{4} \). Now, when we look at \( 1^{3} \), that's just 1 because any number to the zero or higher power is itself unless zero! So, \( \frac{7}{2}^{2} \) is actually a lot bigger than \( 1^{3} \). Remember, when you square a fraction, you square both the top (numerator) and the bottom (denominator)! Keep practicing, and you'll get the hang of it!