Q. Solve the following logarithm problem for the positive solution for x.logx81=−43Answer:
Understand logarithmic equation: Understand the logarithmic equation.The given logarithmic equation is logx81=−43. This means that x raised to the power of −43 equals 81.Mathematically, this can be written as x−43=81.
Convert to exponential form: Convert the logarithmic equation to exponential form.Using the definition of a logarithm, we can rewrite the equation in its exponential form: x(−3/4)=81.
Recognize power of 1/8: Recognize that 1/8 is a power of 2.Since 1/8 is 2−3, we can rewrite the equation as x−3/4=2−3.
Set exponents equal: Set the exponents equal to each other.Since the bases are equal x and 2, we can set the exponents equal to each other: −43=−3.
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