Solve ((x^(1/4) × 3² × 6³)^(1/4))^8: Complex Exponent Simplification

Question

((x14×32×63)14)8= ((x^{\frac{1}{4}}\times3^2\times6^3)^{\frac{1}{4}})^8=

Video Solution

Solution Steps

00:00 Solve
00:03 When there's a power of a power, the combined exponent is the product of the exponents
00:07 When there's a power on a product of multiple terms, all terms are raised to that power
00:12 We'll start from the innermost parentheses and solve outward
00:25 And this is the solution to the question

Step-by-Step Solution

Let's solve this in two stages. In the first stage, we'll use the power rule for powers in parentheses:

(zt)n=zntn (z\cdot t)^n=z^n\cdot t^n

which states that when a power is applied to terms in parentheses, it applies to each term inside the parentheses when they are opened,

Let's apply this rule to our problem:

((x143263)14)8=((x14)14(32)14(63)14)8 \big((x^{\frac{1}{4}}\cdot3^2\cdot6^3)^{\frac{1}{4}}\big)^8=((x^{\frac{1}{4}})^{\frac{1}{4}}\cdot(3^2)^{\frac{1}{4}}\cdot(6^3)^{\frac{1}{4}})^8

where when opening the parentheses, we applied the power to each term separately, but since each of these terms is raised to a power, we did this carefully and used parentheses,

Next, we'll use the power rule for a power raised to a power:

(bm)n=bmn (b^m)^n=b^{m\cdot n}

Let's apply this rule to the expression we got:

(x141432146314)8=(x116324634)8=x116832486348=x81631646244 (x^{\frac{1}{4}\cdot\frac{1}{4}}\cdot3^{2\cdot\frac{1}{4}}\cdot6^{3\cdot\frac{1}{4}})^8=(x^{\frac{1}{16}}\cdot3^{\frac{2}{4}}\cdot6^{\frac{3}{4}})^8=x^{\frac{1}{16}\cdot8}\cdot3^{\frac{2}{4}\cdot8}\cdot6^{\frac{3}{4}\cdot8}=x^{\frac{8}{16}}\cdot3^{\frac{16}{4}}\cdot6^{\frac{24}{4}}

where in the second stage we performed multiplication in the fractions of the power expressions of the terms we obtained, remembering that multiplication in fractions is actually multiplication in the numerator, and then - in the final stage we simplified the fractions in the power expressions of the multiplication terms we got:

x81631646244=x123466 x^{\frac{8}{16}}\cdot3^{\frac{16}{4}}\cdot6^{\frac{24}{4}}=x^{\frac{1}{2}}\cdot3^4\cdot6^6

Therefore, the correct answer is answer B.

Answer

x12×34×66 x^{\frac{1}{2}}\times3^4\times6^6