Understand given equation: Let's start by understanding the given equation: (log81x)(logx31)=46. We can use the property of logarithms that states logab=logba1, which is known as the change of base formula. This allows us to rewrite the equation in a more familiar form.
Apply change of base formula: Applying the change of base formula to the given equation, we get:(log81x)(log3x)=641Since 81 is 3 raised to the power of 4 (81=34), we can rewrite log81x as 41log3x.
Substitute and simplify: Substituting log81x with (41)log3x in the equation, we have:((41)log3x)(log3x)=6(41)Now, let's simplify the left side of the equation by multiplying the two logarithms together.
Multiply logarithms: Multiplying the two logarithms together, we get:(41)(log3x)2=6(41)Now, we can multiply both sides of the equation by 4 to get rid of the fraction on the left side.
Multiply by 4: Multiplying both sides by 4, we obtain: (log3x)2=6 Now, we can take the square root of both sides to solve for log3x.
Take square root: Taking the square root of both sides, we have:log3x=6 or log3x=−6However, since a logarithm cannot have a negative result if the base and the argument are positive and real (which they are in this case), we discard the negative solution.
Discard negative solution: We are left with log3x=6. To find the value of x, we need to rewrite this equation in exponential form, which is x=36.
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