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Which expression is equivalent to [tex]\left(\frac{4^{\frac{5}{4}} \cdot 4^{\frac{1}{4}}}{4^{\frac{1}{2}}}\right)^{\frac{1}{2}}[/tex]?

A. [tex]\sqrt[16]{4^5}[/tex]
B. [tex]\sqrt{2^5}[/tex]
C. 2
D. 4

Sagot :

To find which expression is equivalent to \(\left(\frac{4^{\frac{5}{4}} \cdot 4^{\frac{1}{4}}}{4^{\frac{1}{2}}}\right)^{\frac{1}{2}}\), let's break it down step-by-step.

1. Combine the exponents in the numerator:
[tex]\[ 4^{\frac{5}{4}} \cdot 4^{\frac{1}{4}} = 4^{\left(\frac{5}{4} + \frac{1}{4}\right)} = 4^{\frac{6}{4}} = 4^{\frac{3}{2}} \][/tex]
So our expression now is:
[tex]\[ \left(\frac{4^{\frac{3}{2}}}{4^{\frac{1}{2}}}\right)^{\frac{1}{2}} \][/tex]

2. Simplify the division of the bases with exponents:
[tex]\[ \frac{4^{\frac{3}{2}}}{4^{\frac{1}{2}}} = 4^{\left(\frac{3}{2} - \frac{1}{2}\right)} = 4^{\frac{2}{2}} = 4^1 = 4 \][/tex]
Now our expression simplifies to:
[tex]\[ \left(4\right)^{\frac{1}{2}} \][/tex]

3. Take the square root of the result:
[tex]\[ \left(4\right)^{\frac{1}{2}} = \sqrt{4} = 2 \][/tex]

Thus, the equivalent expression is:
[tex]\[ 2 \][/tex]

So the correct answer is:
[tex]\[ \boxed{2} \][/tex]