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meriva
3 years ago
15

What is the inverse of the function y=3e^(4x+1)

Mathematics
2 answers:
Sergeeva-Olga [200]3 years ago
6 0
To find the inverse interchange the variables and solve for y

f^-1 (x) = - 1/4 + in(x)/4 - in(3)/4
Mademuasel [1]3 years ago
3 0

Answer:

The inverse of the function y=3e^{4x+1}  is f^{-1}(x) =\frac{\ln \left(\frac{x}{3}\right)-1}{4}

Step-by-step explanation:

Given the function y=3e^{4x+1} we want to find the inverse function, f^{-1}(x)

  1. First, replace every <em>x</em> with a <em>y</em> and replace every <em>y</em> with an <em>x.</em>
  2. Solve the equation from Step 1 for y.
  3. Replace <em>y </em>with f^{-1}(x).

Applying the above process we get:

\mathrm{Interchange\:the\:variables}\:x\:\mathrm{and}\:y\\\\x=3e^{4y+1}\\\\\mathrm{Solve}\:x=3e^{4y+1}\:\mathrm{for}\:y\\\\3e^{4y+1}=x\\\\\frac{3e^{4y+1}}{3}=\frac{x}{3}\\\\e^{4y+1}=\frac{x}{3}

\mathrm{If\:}f\left(x\right)=g\left(x\right)\mathrm{,\:then\:}\ln \left(f\left(x\right)\right)=\ln \left(g\left(x\right)\right)\\\\\ln \left(e^{4y+1}\right)=\ln \left(\frac{x}{3}\right)\\\\\mathrm{Apply\:log\:rule}:\quad \log _a\left(x^b\right)=b\cdot \log _a\left(x\right)\\\\\left(4y+1\right)\ln \left(e\right)=\ln \left(\frac{x}{3}\right)\\\\4y+1=\ln \left(\frac{x}{3}\right)\\\\y=\frac{\ln \left(\frac{x}{3}\right)-1}{4}\\\\f^{-1}(x) =\frac{\ln \left(\frac{x}{3}\right)-1}{4}

The inverse of the function y=3e^{4x+1}  is f^{-1}(x) =\frac{\ln \left(\frac{x}{3}\right)-1}{4}

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