The term application of derivatives refers to the term rate of changing in the quantities, increasing and decreasing functions, maxima and minima, and many other terms. The maxima and minima of the functions include the maximum and minimum values of the function that are present in the functions.
We have to assume that the f is a function differential in (a,b) where as closed in [a,b].
Application of Derivatives Sample Questions for Class 12
Question 1
What is the second derivative of f(x)=3x^3+2x^2?
A. f''(x)=18x+4
B. f''(x)=9x^2+4x
C. f''(x)=18
D. f''(x)=0
Question 2
Find where the function f(x) = xln(x^2) is increasing and where it is decreasing.
A. Increasing on (-oo,0) and decreasing on (0,oo)
B. Increasing on (-oo,-1/e) uu (1/e, oo) and decreasing on (-1/e,0) uu (0,1/e)
C. Increasing on (-1/e,0) uu (0,1/e) and decreasing on (-oo,-1/e) uu (1/e, oo)
D. Increasing on (-oo,oo)
Question 3
Determine the intervals of increase and decrease. f(x) = x^2/(x^2-1)
A. Increasing on (-oo,0) and decreasing on (0,oo)
B. Increasing on (-sqrt(2),0) uu (sqrt(2),oo) and decreasing on (-oo,-sqrt(2)) uu (0,sqrt(2))
C. Increasing on (-oo,-1) uu (1,oo) and decreasing on (-1,1)
D. Increasing on (-oo,-1) uu (-1,0) and decreasing on (0,1) uu (1,oo)
Question 4
What is the derivative of f(x)=3x^3+2x^2?
A. f'(x)=9x^2+4x
B. f'(x)=3x^2+2x
C. f'(x)=0
D. f'(x)=12x^2+6x
Question 5
Identify the intervals on which the given function is increasing and decreasing.f(x)=x^2 e^(-x^2)
A. Increasing: (-oo, -1) uu (0,1); decreasing: (-1, 0) uu (1,oo)
B. Increasing: (-oo, 0); decreasing: (0, oo)
C. Increasing for all x
D. Increasing: (-1,0) uu (1,oo); decreasing: (-oo, -1) uu (0,1)