Q. Find the value of x that solves the equation ln(x−2)−2ln4=ln1.Answer: x=
Simplify the equation: First, we need to simplify the equation using properties of logarithms. The equation is ln(x−2)−2ln(4)=ln(1). We know that ln(1) is equal to 0 because the natural logarithm of 1 is always 0. So, the equation simplifies to ln(x−2)−2ln(4)=0.
Apply logarithmic properties: Next, we can use the property of logarithms that states ln(ab)=b⋅ln(a) to simplify the term 2ln(4). This gives us ln(x−2)−ln(42)=0. Since 42 is 16, this simplifies further to ln(x−2)−ln(16)=0.
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(ba). This gives us ln(16x−2)=0.
Remove natural logarithm: To solve for x, we need to get rid of the natural logarithm. We can exponentiate both sides of the equation with base e to remove the ln, which gives us eln((x−2)/16)=e0. Since e0 is 1, and eln(y) is y for any y, we have (x−2)/16=1.
Solve for x: Finally, we solve for x by multiplying both sides of the equation by 16. This gives us x−2=16. Adding 2 to both sides gives us x=16+2, which simplifies to x=18.
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