use rational exponents to write

x 1/4.y 1/6.z 1/9

as a single radical expression

you could write it as

x^(9/36) y^(6/36) z^(4/36)

= (x^9 y^6 z^4)^(1/36)

or 36th root of (x^9 y^6 z^4)

To write the expression using rational exponents as a single radical expression, you need to find a common denominator for the exponents of each variable x, y, and z.

The common denominator for the exponents 1/4, 1/6, and 1/9 is 36.

Now, rewrite each exponent with the common denominator:

x^(1/4) = x^(9/36)
y^(1/6) = y^(6/36)
z^(1/9) = z^(4/36)

Next, use the rule that states if you have a product of exponential expressions with the same base, you can combine the exponents by adding them together.

Therefore, the expression becomes:

x^(9/36).y^(6/36).z^(4/36)

To simplify this further, let's rewrite it using a single radical expression:

(x^(9/36) . y^(6/36) . z^(4/36))^(36/36)

Since any number raised to the power of 1 is itself, we can simplify the exponent to:

(x^(9/36) . y^(6/36) . z^(4/36))^1

Finally, our single radical expression is:

∛(x^9 . y^6 . z^4)