5^(1/3) x 25^(1/3)?

1 Answer
Feb 9, 2018

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# "Answer is:" \qquad 5.#

Explanation:

# \ #

# "We can simplify this by using one Rule for Exponents," #
# "and only one time." #

# "We compute:" #

# 5^{1/3} \cdot 25^{1/3} \ = \ ( 5 \cdot 25 )^{1/3} \qquad \qquad \qquad \ "Rule for Exponents:" \quad a^nb^n = (ab)^n #

# \qquad \qquad \qquad \quad \ = \ root(3)( 5 \cdot 25 ) \qquad \qquad \qquad \quad \ "Definition of Rational Exponent"#

# \qquad \qquad \qquad \quad \ = \ root(3)( 125 ) \qquad \qquad \qquad \qquad \quad \ "Computation" #

# \qquad \qquad \qquad \quad \ = \ root(3)( 125 ) \qquad \qquad \qquad \qquad \quad \ "Numerical Fact" #

# \ #

# "And so we are done:" #

# \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad 5^{1/3} \cdot 25^{1/3} \ = \ 5. #