Lesson: Challenging Problem Solving - 15t01

Advanced Number Properties: Know The Rules, Continued

[Page 15 of 37]

Now solve the following question on your own.

Select the correct answer and then click Continue.
8

In order to solve this problem, it is necessary to have a strong grasp on radical and exponent rules:

Like radicals can be added to one another.

A negative exponent indicates a reciprocal. To arrive at an equivalent expression, take the reciprocal of the base and change the sign of the exponent:

The correct answer is Choice (B). This answer can also be obtained using a similar rule-based approach.
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