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

If 2a + b = 10 and a - b = 4, what is the value of a?

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If the product of two numbers is 120 and their sum is 26, what are the numbers?

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The LCM of 12 and 15 is:

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What is the area of an equilateral triangle with side length 10 cm?

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If the sides of a triangle are 6 cm, 8 cm, and 10 cm, what is the area of the triangle?

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If a:b = 3:4 and b:c = 5:6, what is a:c?

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A number is increased by 20% and then decreased by 20%. What is the net change?

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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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A train 120 meters long is moving at a speed of 54 km/h. How long will it take to pass a pole?

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What is the area of a circle with a diameter of 14 cm?

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