CBSE /Class 8
Maths MCQ Based On Laws of exponents
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CBSE Class 8 Maths Laws of exponents
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Use identities.
Solve the equation by solving the power and then convert that answer as the power of a number.
Use the power outside the bracket in order to find the answer of the question.
\\(\\frac{(-5)^{67}\\times(-5) ^{-64}}{(-3)^{90}\\times(-3) ^{-93}}\\)=\\(​​​​\\frac{(-5)^{3}}{(-3)^{-3}}\\) =\\(​​​​(-5)^{3}\\times(-3)^{3}=3,375\\)
\\((a^{m})^{n} = a^{mn}\\)
Definition
Convert 243 and 9 in powers of 3
Express it as a fraction first
Recall the definitions in exponential expressions.
Convert in standard form first then compare.
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