Simplify the Radical Expression: (⁶√5³)/(³√5³) Step by Step

Question

Solve the following exercise:

536533= \frac{\sqrt[6]{5^3}}{\sqrt[3]{5^3}}=

Video Solution

Solution Steps

00:00 Simplify the following problem
00:03 When we have a root of the order (B) on a number (X) raised to power (A)
00:06 The result equals the number (X) raised to power (A divided by B)
00:09 Apply this formula to our exercise
00:18 When we have a division of powers (A\B) with equal bases
00:23 The result equals the common base raised to the difference of the powers (A - B)
00:27 Apply this formula to our exercise, and subtract between the powers
00:34 Determine the common denominator and proceed to calculate the power
00:58 When we have a negative power
01:01 we can flip the numerator and denominator to obtain a positive power
01:06 Apply this formula to our exercise
01:12 Apply this formula again to our exercise but in the opposite direction
01:18 Convert from power to square root
01:23 This is the solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Convert the given roots into fractional exponents.

  • Step 2: Simplify the fractional exponents where necessary.

  • Step 3: Divide using the properties of exponents.

  • Step 4: Simplify the resulting expression.

Now, let's work through each step:

Step 1: Convert the roots to fractional exponents.
The expression 536533 \frac{\sqrt[6]{5^3}}{\sqrt[3]{5^3}} becomes (53)16(53)13\frac{(5^3)^{\frac{1}{6}}}{(5^3)^{\frac{1}{3}}}.

Step 2: Simplify each fractional exponent.
We know (am)n=amn(a^m)^n = a^{m \cdot n}. So, apply this rule: -

(53)16=5316=536=512(5^3)^{\frac{1}{6}} = 5^{3 \cdot \frac{1}{6}} = 5^{\frac{3}{6}} = 5^{\frac{1}{2}}.

(53)13=5313=533=51=5(5^3)^{\frac{1}{3}} = 5^{3 \cdot \frac{1}{3}} = 5^{\frac{3}{3}} = 5^1 = 5.

Step 3: Divide using the properties of exponents.
The division of powers with the same base: am/an=amna^m / a^n = a^{m-n}. Thus, 5125\frac{5^{\frac{1}{2}}}{5} simplifies to 51215^{\frac{1}{2} - 1}.

Step 4: Simplify the resulting exponent expression.
5121=512=1512=55^{\frac{1}{2} - 1} = 5^{-\frac{1}{2}} = \frac{1}{5^{\frac{1}{2}}} = \sqrt{5}, (since the negative exponent indicates reciprocal).

Therefore, the solution to the problem is 5\sqrt{5}, which matches Choice 2.

Answer

5 \sqrt{5}