1.

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

Answer»

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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