Q. Solve for the exact value of x.log4(9x)+log4(9)=3Answer:
Apply product rule: Apply the product rule of logarithms to combine the logarithmic terms.The product rule of logarithms states that logb(m)+logb(n)=logb(m∗n) for the same base b.So, log4(9x)+log4(9) becomes log4(9x×9).
Simplify expression: Simplify the expression inside the logarithm.Multiplying 9x by 9 gives us 81x.So, log4(9x×9) becomes log4(81x).
Set equation equal: Set the logarithmic equation equal to 3. We now have log4(81x)=3.
Convert to exponential form: Convert the logarithmic equation to its exponential form.The exponential form of log4(81x)=3 is 43=81x.
Calculate value: Calculate 43. 43 equals 64. So, the equation becomes 64=81x.
Solve for x: Solve for x.Divide both sides of the equation by 81 to isolate x.x=8164.
Simplify fraction: Simplify the fraction if possible. 64 and 81 have no common factors other than 1, so the fraction is already in its simplest form. x=8164.
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