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Find the value of 
x that solves the equation 
ln(x-2)-2ln 4=ln 1.
Answer: 
x=

Find the value of x x that solves the equation ln(x2)2ln4=ln1 \ln (x-2)-2 \ln 4=\ln 1 .\newlineAnswer: x= x=

Full solution

Q. Find the value of x x that solves the equation ln(x2)2ln4=ln1 \ln (x-2)-2 \ln 4=\ln 1 .\newlineAnswer: x= x=
  1. Simplify the equation: First, we need to simplify the equation using properties of logarithms. The equation is ln(x2)2ln(4)=ln(1)\ln(x-2) - 2\ln(4) = \ln(1). We know that ln(1)\ln(1) is equal to 00 because the natural logarithm of 11 is always 00. So, the equation simplifies to ln(x2)2ln(4)=0\ln(x-2) - 2\ln(4) = 0.
  2. Apply logarithmic properties: Next, we can use the property of logarithms that states ln(ab)=bln(a)\ln(a^b) = b\cdot\ln(a) to simplify the term 2ln(4)2\ln(4). This gives us ln(x2)ln(42)=0\ln(x-2) - \ln(4^2) = 0. Since 424^2 is 1616, this simplifies further to ln(x2)ln(16)=0\ln(x-2) - \ln(16) = 0.
  3. Combine logarithmic terms: Now, we can use another property of logarithms that allows us to combine the two logarithmic terms into one by division inside the logarithm: ln(a)ln(b)=ln(ab)\ln(a) - \ln(b) = \ln\left(\frac{a}{b}\right). This gives us ln(x216)=0\ln\left(\frac{x-2}{16}\right) = 0.
  4. Remove natural logarithm: To solve for xx, we need to get rid of the natural logarithm. We can exponentiate both sides of the equation with base ee to remove the ln\ln, which gives us eln((x2)/16)=e0e^{\ln((x-2)/16)} = e^0. Since e0e^0 is 11, and eln(y)e^{\ln(y)} is yy for any yy, we have (x2)/16=1(x-2)/16 = 1.
  5. Solve for x: Finally, we solve for x by multiplying both sides of the equation by 1616. This gives us x2=16x-2 = 16. Adding 22 to both sides gives us x=16+2x = 16 + 2, which simplifies to x=18x = 18.

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