Solve .
Answer and explanation
Correct answer: A.
- Step 1: Combine the powers: . Step 2. Equate the exponents: , so . **Answer: . Why not the others:** is what you get if you forget to remove the factor . is what you get if you subtract the exponent the wrong way. is what you get if you give the power instead of the exponent.
Practise more Calculus, Algebra and Trigonometry.
Free questions with an explanation for every one, and full timed ECAT Pakistan mock tests.
More Calculus, Algebra and Trigonometry questions
- Find the eccentricity of the hyperbola x²/25 − y²/144 = 1.
- Find a × b for a = 2i + 0j + 2k and b = -3i − 1j − 2k.
- Solve dy/dx = 6x with y(0) = 3. What is y(3)?
- Evaluate the integral of 2x(x² + 1)^3 from x = 0 to x = 1.
- How many permutations of 10 objects taken 2 at a time are there?
- If and are the roots of , find .