Topic Details (Notes format)

How to Solve Exponential Equations

Subject: Mathematics

Book: Maths Mastery

Exponential equations have the variable in the exponent, such as 2^x = 8. One approach is to rewrite both sides using the same base. For example, 8 can be written as 2³, so 2^x = 2³ implies x = 3. In more complicated cases, you may take logarithms of both sides: If 5^x = 100, applying log yields x log(5) = log(100), so x = log(100)/log(5). Exponential equations govern growth phenomena, from population expansions to radioactive decay, making them central in biology, finance (compound growth), and physics. Mastering exponential solving ensures you can interpret and forecast exponential trends accurately.

Practice Questions

The sum of the reciprocals of two numbers is 1/4. If one number is 12, what is the other?

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A rectangle has a length of 10 cm and a width of 5 cm. What is the diagonal of the rectangle?

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What is the sum of the first 20 odd numbers?

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If a square has a perimeter of 64 cm, what is its area?

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If the sum of the squares of two consecutive positive integers is 365, what are the integers?

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What is the value of x if log(x) + log(4) = log(32)?

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How many ways can 4 people sit in a row?

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What is the value of log₃(27)?

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If a = 4 and b = 5, what is the value of (a+b)^2?

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If x + 1/x = 5, what is the value of x^2 + 1/x^2?

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