Q. What is the expression for f(x) when we rewrite 45x−164x as 4f(x) ?f(x)=
Express as Power of 4: First, we need to express 64 as a power of 4 because the denominator is already in base 4. We know that 64 is 4 cubed, or 43. So we can rewrite 64x as (43)x.
Apply Power of a Power Rule: Now we apply the power of a power rule, which states that a^b)^c = a^{b*c}\. So \(\(4^3)^x\ becomes (4\)^{3x}\.
Rewrite with New Base Exponent: Next, we rewrite the original expression with the new base 4 exponent in the numerator: (43x)/(45x−1).
Use Quotient of Powers Rule: Now we use the quotient of powers rule, which states that am/an=am−n. So we subtract the exponent in the denominator from the exponent in the numerator: 43x−45x−1 becomes 43x−(5x−1).
Simplify Exponent: We simplify the exponent by distributing the negative sign inside the parentheses: 3x−(5x−1) becomes 3x−5x+1.
Combine Like Terms: Now we combine like terms in the exponent: 3x−5x+1 becomes −2x+1.
Final Expression: Finally, we have the expression for f(x) as the exponent of 4 that we've simplified: f(x)=−2x+1.
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