Q. Find the value of x that solves the equation ln(x+2)−31ln8=ln2.Answer: x=
Simplify using properties: To solve the equation ln(x+2)−(31)ln8=ln2, we first need to simplify the equation by using the properties of logarithms.
Rewrite using power rule: Using the power rule of logarithms, which states that ln(ab)=b⋅ln(a), we can rewrite (1/3)ln8 as ln(81/3).
Combine logarithms: Since 81/3 is the cube root of 8, which is 2, we can further simplify the equation to extln(x+2)−extln(2)=extln(2).
Equation simplification: Now, we can use the property of logarithms that ln(a)−ln(b)=ln(ba) to combine the left side of the equation into a single logarithm: ln(2x+2)=ln(2).
Equating arguments: Since the logarithmic function is one-to-one, if ln(a)=ln(b), then a=b. Therefore, we can equate the arguments of the logarithms: 2x+2=2.
Multiply to solve: To solve for x, we multiply both sides of the equation by 2 to get x+2=4.
Subtract to find: Finally, we subtract 2 from both sides to find the value of x: x=4−2.
Final solution: So, the value of x that solves the equation is x=2.
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