Simplify the Nested Radical: Finding the Value of ∜(√(x⁸))

Question

Complete the following exercise:

x88= \sqrt[8]{\sqrt{x^8}}=

Video Solution

Solution Steps

00:00 Solve the following problem
00:09 When we have a number (A) to the power of (B) in a root of order (C)
00:13 The result equals the number (A) to the power of their quotient (B divided by C)
00:16 We'll apply this formula to our exercise, and proceed to calculate the power quotient
00:25 This is the solution

Step-by-Step Solution

To solve the problem x88 \sqrt[8]{\sqrt{x^8}} , we'll simplify the expression using exponent rules:

  • Step 1: Express the inner square root using exponents. We know x8=(x8)1/2=x81/2=x4 \sqrt{x^8} = (x^8)^{1/2} = x^{8 \cdot 1/2} = x^4 .
  • Step 2: Express the entire expression with the 8th root as an exponent. We have x48=(x4)1/8 \sqrt[8]{x^4} = (x^4)^{1/8} .
  • Step 3: Simplify the expression, using (xa)b=xab (x^a)^{b} = x^{a \cdot b} . Therefore, (x4)1/8=x41/8=x1/2 (x^4)^{1/8} = x^{4 \cdot 1/8} = x^{1/2} .
  • Step 4: Recognize x1/2 x^{1/2} is another way to write x \sqrt{x} .

Thus, the expression simplifies to x \sqrt{x} .

Answer

x \sqrt{x}