Q. Solve for the exact value of x.log3(9x)−2log3(3)=2Answer:
Understand Logarithm Properties: Understand the properties of logarithms that can be used to simplify the equation.We can use the power rule of logarithms, which states that logb(ac)=c⋅logb(a), to simplify the second term on the left side of the equation.
Apply Power Rule: Apply the power rule to the second term of the equation.2log3(3) becomes log3(32), since we can move the 2 in front of the log to the exponent of the argument.
Simplify Using Logarithmic Properties: Simplify the equation using the fact that 32 is 9. log3(9x)−log3(9)=2
Combine Logarithmic Terms: Combine the logarithmic terms on the left side using the quotient rule of logarithms.The quotient rule states that logb(a)−logb(c)=logb(ca). Therefore, we can combine the two logarithms on the left into a single logarithm.log3(99x)=2
Simplify Fraction Inside Logarithm: Simplify the fraction inside the logarithm. 99x simplifies to x.log3(x)=2
Convert to Exponential Equation: Convert the logarithmic equation to an exponential equation.Using the definition of a logarithm, logb(a)=c is equivalent to bc=a, we can rewrite the equation as:32=x
Calculate Final Value: Calculate the value of 32. 32 is 9. x=9
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