Q. What is the expression for f(x) when we rewrite 35x+3⋅27x as 3f(x) ?f(x)=
Rewrite 27 as power of 3: We need to express the product of two powers of 3 as a single power of 3. The given expression is 35x+3×27x. We know that 27 is a power of 3, specifically 27=33. So, we can rewrite 27x as (33)x.
Apply power of a power rule: Now we apply the power of a power rule, which states that (ab)c=a(b∗c). So, (33)x becomes 3(3∗x) or 33x.
Multiply expressions with same base: Next, we multiply the two expressions with the same base by adding their exponents. The expression becomes 35x+3×33x. According to the laws of exponents, am×an=am+n. So, we add the exponents 5x+3 and 3x together.
Combine like terms: Adding the exponents gives us 35x+3+3x. We combine like terms to simplify the exponent: 5x+3x=8x and 3 remains unchanged.
Simplify the exponent: The simplified exponent is 8x+3. Therefore, the expression 35x+3×27x can be rewritten as 38x+3.
Set f(x) equal to exponent: Since we want to express this as 3f(x), we set f(x) equal to the exponent we found. So, f(x)=8x+3.