6) Write with positive exponents: [ 3-3 a-2 b5

c-3 d-4]

To write the expression with positive exponents, we need to move any term with a negative exponent to the denominator.

Let's rewrite the expression:

\[ 3^{-3}a^{-2}b^5c^{-3}d^{-4} \]

To move the terms with negative exponents to the denominator, we can use the rule that states negative exponents can be written as the reciprocal of the base raised to the positive exponent.

\[ \frac{1}{3^3} \cdot \frac{1}{a^2} \cdot b^5 \cdot \frac{1}{c^3} \cdot \frac{1}{d^4} \]

Simplifying each term, we get:

\[ \frac{1}{27} \cdot \frac{1}{a^2} \cdot b^5 \cdot \frac{1}{c^3} \cdot \frac{1}{d^4} \]

Therefore, the expression with positive exponents is \( \frac{b^5}{27a^2c^3d^4} \).