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GREYUIT [131]
3 years ago
11

What is the cube root of b^27? a. b^3 b. b^9 c. b^18 d. b^34

Mathematics
2 answers:
andrew11 [14]3 years ago
6 0

Answer:

Option b is correct.

Step-by-step explanation:

\sqrt[3]{b^{27} }) =(b^{27}) ^{\frac{1}{3} } =b^(\frac{27}{3} )= b^9\\

Explanation in words

We can write any radical form in to exponent form therefore we wrote

cube root in to exponent form as \frac{1}{3}

In second step we used the formula for exponent of exponent  of terms

which gives  27 divided by 3 in the exponent of b consequently we get

9 in the exponent of b or we can write b^9 which gives option b as the answer.

Annette [7]3 years ago
3 0

Answer: b. b^9


Step-by-step explanation:

1. You can rewrite  \sqrt[3]{b^{27}} as following:

(b^{27})^{\frac{1}{3}}

Because, by definition \sqrt[n]{x}=x^{\frac{1}{n}}

2. Now, keeping on mind the exponents properties, you can multiply the exponents, then you obtain:

b^{\frac{27}{3}}

3. Finally, you must simplify the exponent, then, you obtain the following result:

 b^{9}

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