What is the value of ?
Answer and explanation
Correct answer: A.
- Step 1: A negative index means invert: .
- Step 2: Cube root first: .
- Step 3: Then square: .
Answer
.
Why not the others: : ignores the negative sign of the index, so the fraction is not inverted. : takes the cube root only and does not square it. : inverts the wrong way and uses the index in place of .
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