Q. Given x>0, the expression 8x49 is equivalent tox68xx58x2x58xx68x2
Understand Expression and Properties: Understand the given expression and the properties of exponents and roots.The given expression is 8x49, which means we are looking for the 8th root of x raised to the 49th power. We can use the property of exponents that states nam=anm to simplify the expression.
Apply Exponent Property: Apply the exponent property to the given expression.Using the property from Step 1, we can rewrite 8x49 as x849.
Simplify Exponent Division: Simplify the exponent by dividing 49 by 8. When we divide 49 by 8, we get 6 with a remainder of 1. This means that x(49/8) can be written as x(6+1/8).
Separate Exponents: Separate the whole number exponent from the fractional exponent.We can rewrite x6+81 as x6⋅x81 by using the property of exponents that states am+n=am⋅an.
Recognize 8th Root: Recognize that x81 is the 8th root of x. We can now see that x81 is the same as 8x, so the expression becomes x6⋅8x.
Check Answer Choices: Check the answer choices to see which one matches our simplified expression.The correct answer choice that matches x6⋅8x is the last one: x68x2. However, we need to verify that this is indeed equivalent to our simplified expression.
Verify Equivalence: Verify the equivalence of x68x2 and x6⋅8x. We can see that x68x2 implies an additional factor of x82 or x41, which is not present in our simplified expression. Therefore, this answer choice is incorrect, and we have made a mistake in matching the answer choices.
More problems from Multiplication with rational exponents