Home › AP EAPCET (Engineering) › Mathematics › Application of Derivatives › The function f(x) = x^2 - 4x is increasing for w…
The function f(x) = x^2 - 4x is increasing for which values of x?
Ax > 0
Bx > 4
Cx > 2
Dx < 2
Answer & Solution
Correct answer: C. x > 2
f'(x) = 2x - 4 is positive exactly when x > 2.
Related questions
If y = x^2 and x changes from 3 to 3.01, what is the approximate change dy?Using the tangent line at x = 25, what is the linear approximation of sqrt(26)?The derivative of displacement with respect to time gives which quantity?A point moves on y = x^2 with x increasing at 3 units/s. How fast does y change at x = 2?In a related rates problem, once the equation is built, one differentiates with respect toA circle's radius changes at 0.5 cm/s. How fast does its circumference change?A balloon's volume grows at 100 cu cm/s. How fast does its radius grow at r = 5 cm?A 10 m ladder's foot slides out at 3 m/s. How fast does its top fall when the foot is 6 m