Question

State which of the following are surds:
a) ³√81
b) ⁴√256​

Answer 1

Step-by-step explanation:

a) is surd because 81 is not a perfect cube . Thus when you take the cube root of a non-perfect cube number , the answer will be a surd. b) is not a surd because when you take the fourth root of 256, it is a whole number which is 4.

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