Explore Westonci.ca, the top Q&A platform where your questions are answered by professionals and enthusiasts alike. Connect with professionals on our platform to receive accurate answers to your questions quickly and efficiently. Experience the ease of finding precise answers to your questions from a knowledgeable community of experts.

Evaluate the following expression when [tex]\( x = -4 \)[/tex] and [tex]\( y = 4 \)[/tex]:

[tex]\[
\frac{x^5 - x}{4y}
\][/tex]

A. [tex]\(\frac{1,025}{4}\)[/tex]

B. [tex]\(\frac{1,023}{4}\)[/tex]

C. [tex]\(-\frac{1,023}{4}\)[/tex]

D. [tex]\(\frac{16,385}{4}\)[/tex]


Sagot :

To evaluate the expression [tex]\(\frac{x^5 - x}{4y}\)[/tex] when [tex]\(x = -4\)[/tex] and [tex]\(y = 4\)[/tex], let's break down the steps in detail.

1. Substitute the values of [tex]\(x\)[/tex] and [tex]\(y\)[/tex]:
[tex]\[ x = -4, \quad y = 4 \][/tex]

2. Calculate [tex]\(x^5\)[/tex]:
[tex]\[ x^5 = (-4)^5 = -1024 \][/tex]

3. Calculate [tex]\(x^5 - x\)[/tex]:
[tex]\[ x^5 - x = -1024 - (-4) = -1024 + 4 = -1020 \][/tex]

4. Calculate the denominator [tex]\(4 \cdot y\)[/tex]:
[tex]\[ 4 \cdot y = 4 \cdot 4 = 16 \][/tex]

5. Form the fraction:
[tex]\[ \frac{x^5 - x}{4y} = \frac{-1020}{16} \][/tex]

6. Simplify the fraction:
[tex]\[ \frac{-1020}{16} = -63.75 \][/tex]

Hence, the expression [tex]\(\frac{x^5 - x}{4y}\)[/tex] evaluates to [tex]\(-63.75\)[/tex].

Given the answer choices in the problem, none of them directly match [tex]\(-63.75\)[/tex]. But based on the problem structure, let's confirm if the corrected values maybe there under another fraction form:

[tex]\[ -\frac{1023}{4} = -255.75 \quad \text{(incorrect)} \][/tex]
[tex]\[ \frac{1025}{4} = 256.25 \quad \text{(incorrect, positive and different value)} \][/tex]
[tex]\[ \frac{16,385}{4} = 4096.25 \quad \text{(incorrect)} \][/tex]

Correcting, base numeric forms:
\[ None aligns directly in given problem answers; calculation fits additional contextual incorrectly given choice's form. Deduction fits corrected path thus none directly selection preflected-alignment.