Topic Details (Notes format)

How to Solve Exponential Inequalities

Subject: Mathematics

Book: Maths Mastery

Exponential inequalities, like 2^x > 10 or 3^(x–1) ≤ 27, often require taking logarithms or rewriting terms. For 2^x > 10, x>log₂(10), so x> ~3.3219. Alternatively, if 3^(x–1)≤27, note 27=3³, so x–1≤3 → x≤4. Watch for sign flips if the base is between 0 and 1 (like (1/2)^x). These inequalities apply to population bounds, decay processes, or resource management. Mastering exponential inequalities fosters confident handling of wide-ranging growth/decay constraints in scientific, financial, or engineering domains.

Practice Questions

If a = 2 and b = 3, what is the value of (a^2 + b^2)?

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The probability of getting an even number when rolling a die is:

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If a:b = 7:9 and b:c = 5:6, what is a:c?

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If a number is divisible by 9, it is also divisible by which of the following?

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

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If sin(A) = 3/5 and cos(B) = 5/13, where A and B are acute angles, what is sin(A+B)?

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What is the HCF of 72 and 120?

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What is the length of the diagonal of a square with a side length of 7 cm?

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If x:y = 2:3 and z:y = 4:3, what is x:z?

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