Question

State whether the following expressions are polynomials in one variable or not. Give reasons for your answer. $\sqrt[3]{3t}+2t$

Answer 1

$\sqrt[3]{3t}+2t$

$=t^{1/3}+2t$

Since exponent in $t$ has $\frac{1}{3}$ in it. This is not a polynomial in one variable.

Hence, solved.