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What is the value of the expression below?

[tex]\[ \left(8^{2 / 3}\right)^{1 / 2} \][/tex]

A. 1
B. 8
C. 2
D. 4

Sagot :

To solve the expression [tex]\(\left(8^{2 / 3}\right)^{1 / 2}\)[/tex], we'll break it down step-by-step:

1. Calculate the inner exponent:
[tex]\[ 8^{2 / 3} \][/tex]

2. Simplify the base exponentiation:
Recall that [tex]\(8\)[/tex] can be written as [tex]\(2^3\)[/tex]. So we have:
[tex]\[ 8^{2 / 3} = (2^3)^{2 / 3} \][/tex]

3. Use the property of exponents [tex]\((a^m)^n = a^{m \cdot n}\)[/tex]:
Applying this property, we get:
[tex]\[ (2^3)^{2 / 3} = 2^{3 \cdot (2 / 3)} = 2^2 = 4 \][/tex]

4. Now take the outer exponentiation:
[tex]\[ (4)^{1 / 2} \][/tex]

5. Simplify the outer exponent:
[tex]\[ 4^{1 / 2} = \sqrt{4} = 2 \][/tex]

Thus, the value of the expression [tex]\(\left(8^{2 / 3}\right)^{1 / 2}\)[/tex] is [tex]\(2\)[/tex].

Therefore, the correct answer is:
C. 2