Math Problem Statement

Обчисліть значення виразу: 1) \( \sqrt[3]{0.064 \cdot 343} \); 2) \( \sqrt[5]{\frac{7^5}{2^{10}}} \); 3) \( \sqrt[8]{\frac{2^{24} \cdot 3^{16}}{5^{16}}} \)

Solution

The problem consists of three mathematical expressions that involve roots and powers. Let's solve each one step by step.

  1. 0.0643433\sqrt[3]{0.064 \cdot 343}

We can split the multiplication:

0.064=(410)3=(0.4)30.064 = \left(\frac{4}{10}\right)^3 = \left(0.4\right)^3 343=73343 = 7^3

Now we can simplify the expression inside the cube root:

0.064343=(0.4)373=(0.47)3=2.830.064 \cdot 343 = \left(0.4\right)^3 \cdot 7^3 = (0.4 \cdot 7)^3 = 2.8^3

Thus, the cube root simplifies to:

2.833=2.8\sqrt[3]{2.8^3} = 2.8

So, the result of the first expression is 2.82.8.


  1. 752105\sqrt[5]{\frac{7^5}{2^{10}}}

We can simplify the expression inside the fifth root:

[ \sqrt[5]{\frac{7^5}{2^{10}}} = \frac{\sqrt[5]{7^5}}{\sqrt[5]{2^{10}}} ]

The fifth root of 757^5 simplifies to 77, and the fifth root of 2102^{10} simplifies to:

2105=2105=22=4\sqrt[5]{2^{10}} = 2^{\frac{10}{5}} = 2^2 = 4

Thus, the expression becomes:

74\frac{7}{4}

So, the result of the second expression is 74\frac{7}{4}.


  1. 2243165168\sqrt[8]{\frac{2^{24} \cdot 3^{16}}{5^{16}}}

We can simplify the expression inside the eighth root:

224316516=224(35)16\frac{2^{24} \cdot 3^{16}}{5^{16}} = 2^{24} \cdot \left(\frac{3}{5}\right)^{16}

Now, taking the eighth root of the powers:

2248=2248=23=8\sqrt[8]{2^{24}} = 2^{\frac{24}{8}} = 2^3 = 8

(35)168=(35)2=925\sqrt[8]{\left(\frac{3}{5}\right)^{16}} = \left(\frac{3}{5}\right)^2 = \frac{9}{25}

So, the expression becomes:

8925=72258 \cdot \frac{9}{25} = \frac{72}{25}

Thus, the result of the third expression is 7225\frac{72}{25}.


Final Answers:

  1. 2.82.8
  2. 74\frac{7}{4}
  3. 7225\frac{72}{25}

Let me know if you want more details or have any questions!

Here are five related questions:

  1. How do you simplify powers within roots?
  2. What is the general method for solving cube roots of products?
  3. How do fractional exponents relate to roots?
  4. Can you explain how to handle roots of fractions?
  5. How do different bases affect the simplification process in roots?

Tip: When simplifying roots of products or quotients, always look for patterns in the exponents to make the calculations easier.

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Math Problem Analysis

Mathematical Concepts

Roots
Exponents
Simplifying Expressions

Formulas

Cube root: \( \sqrt[3]{a^3} = a \)
Fifth root: \( \sqrt[5]{a^5} = a \)
Eighth root of products: \( \sqrt[n]{a^m} = a^{m/n} \)

Theorems

Exponentiation Rules
Roots of Powers Theorem

Suitable Grade Level

Grades 8-10