Mathematics

Find the derivative of (y=frac{x^7 – x^5}{x^4})

Find the derivative of (y=frac{x^7 – x^5}{x^4})
  • A.
    x(x2-1)
  • B.
    3x(x2-1)
  • C.
    3x2-1
  • D.
    7x6-5x4
Correct Answer: Option C
Explanation

(y=frac{x^7 – x^5}{x^4}\
y = frac{x^7}{x^4} div frac{x^5}{x^4}\
y = x^3 – x \
frac{dy}{dx} = 3x^2 – 1)