The problem
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how are we supposed to input radicals like cubed roots? i used the exponent button to input a 4 before the square root but it tells me expression is incomplete
Answer provided by our tutors
When you’re given a problem in radical form, you can rewrite it by using rational exponents — exponents that are fractions. You can rewrite every radical as an exponent by using the following property:
The top number in the resulting rational exponent tells you the power, and the bottom number tells you the root you’re taking.
So, in your case, 4th root of 1/81 is "(1/81)" to the exponent or "1/4".
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