Problem

$1.\right)$ Which of the following expressions is a rational
algebraic expression?
a. $\dfrac {x^{\dfrac {1} {3}}} {m+n}$ C.
$x+y$ $-$ $\dfrac {\sqrt{x} } {3}$
b. $x^{-2}+y$ d.
$z$

7th-9th grade

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Solution

Qanda teacher - Himanshu

Option C is correct.
Explanation - In A and D their are root in expression so we are not sure about that they are rational or irrational and in option B their is inverse power so we are not sure about it too. But in option C it clearly understood that this expression is rational.

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