Find a, b, c and evaluate expression

Given \(1176 = 2^a \cdot 3^b \cdot 7^c\), find \(a, b, c\) and evaluate \(2^a \cdot 3^b \cdot 7^{-c}\)

Solution

\[ 1176 = 2^3 \cdot 3^1 \cdot 7^2 \]

\[ \Rightarrow a = 3,\; b = 1,\; c = 2 \]

\[ 2^a \cdot 3^b \cdot 7^{-c} \]

\[ = 2^3 \cdot 3^1 \cdot 7^{-2} \]

\[ = 8 \cdot 3 \cdot \frac{1}{49} \]

\[ = \frac{24}{49} \]

Final Answer:

\[ \boxed{a = 3,\; b = 1,\; c = 2,\quad \frac{24}{49}} \]

Next Question / Full Exercise

Spread the love

Leave a Comment

Your email address will not be published. Required fields are marked *