Q. Solve for the exact value of x.log4(2x)−3log4(9)=0Answer:
Apply Power Rule: Let's start by applying the power rule of logarithms to the term with the coefficient of 3. Power rule of logarithms: logb(an)=n⋅logb(a)3log4(9)=log4(93)
Rewrite Equation: Now, let's rewrite the equation using the result from the previous step. log4(2x)−log4(93)=0
Combine Logarithmic Expressions: Next, we can apply the quotient rule of logarithms to combine the two logarithmic expressions into a single logarithm.Quotient rule of logarithms: logb(a)−logb(c)=logb(ca)log4(932x)=0
Rewrite in Exponential Form: To solve for x, we need to rewrite the logarithmic equation in exponential form.If logb(a)=c, then bc=a40=932x
Solve for x: Since 40 is equal to 1, we can now solve for x.1=932x
Isolate x: Multiply both sides of the equation by 93 to isolate x on one side.93=2x
Divide by 2: Now, divide both sides by 2 to solve for x.x=293
Calculate x: Calculate the value of 93 and then divide by 2.93=729x=2729
Calculate x: Calculate the value of 93 and then divide by 2. 93=729x=729/2 Finally, we get the exact value of x.x=364.5
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