Double Differentiation

Q.

What is the derivative of $e^{2x}$?

Q.

What is the derivative of ${\cos }^{-1}\left(x\right)$?

Q. Find the maximum and minimum values of function $y=2x^3-15x^2+36x+11$

1. $42;41$
2. $39;38$
3. $35;34$
4. $52;51$

Q.

If $y=\left(\frac{1}{4}\right)u^4$, $u=\frac{2}{3}{x}^3+5$, then $\frac{dy}{dx}=$

1. $\frac{x^2}{27}{\left(2x^3+15\right)}^3$

2. $\frac{2x}{27}{\left(2x^3+5\right)}^3$

3. $\frac{2x^2}{27}{\left(2x^3+15\right)}^3$

4. None of these

Q. The maximum area of a rectangle (in $m^2$) having perimeter $\text{1000 m}$ is

Q. If $y=x^3$, then $\frac{d^{2}y}{d{x}^2}$ is

1. $6x^2$
2. $6x$
3. $3x^2$
4. $3x$

Q.

Differentiate $x^3+3x^2+x.$

Q.

Superman is going on a vacation to his home planet krypton from earth via. Sun. (Let's assume for a moment that Krypton is not destroyed). His energy v/s distance travelled graph is as shown below:

Find the number of positions where $\frac{dE}{ds}$=0. Based on this find out the number of stars that Super man crossed on his way home from earth. (I hope you know that superman's source of energy is sunlight or star light so the more closer he goes to a star the more energy he has)

1. number of positions : 2, number of stars : 2

2. number of positions : 3, number of stars : 3

3. number of positions : 3, number of stars : 2

4. number of positions : 2, number of stars : 3

Q.

If $y=\frac{A}{x}+B{x}^2$, then $x^2\left(\frac{d^{2}y}{d{x}^2}\right)$is equal to ?

1. $2y$

2. $y^2$

3. $y^3$

4. $y^4$

Q.

if f(x)=x cos x, find f"(x), or $\frac{d^{2}y}{d{x}^2}$

1. - xsinx + cosx

2. - xcosx - 2sinx

3. xsinx - cosx

4. none of these

Q.

Superman is going on a vacation to his home planet krypton from earth via. Sun. (Let's assume for a moment that Krypton is not destroyed). His energy v/s distance travelled graph is as shown below:

Find the number of positions where $\frac{dE}{ds}$=0. Based on this find out the number of stars that Super man crossed on his way home from earth. (I hope you know that superman's source of energy is sunlight or star light so the more closer he goes to a star the more energy he has)

1. number of positions : 3, number of stars : 3

2. number of positions : 2, number of stars : 2

3. number of positions : 3, number of stars : 2

4. number of positions : 2, number of stars : 3

Q. The double derivative at a local maximum is

1. = 0
2. > 0
3. < 0
4. > = 0

Q. Find the maximum and minimum values of function $y=2x^3-15x^2+36x+11$

1. $42;41$
2. $39;38$
3. $35;34$
4. $52;51$

Q.

Find the minimum and maximum value of the function $y=x^3-3x^2+6$. Find the values of y at which it occurs.

1. Maxima at x = 0, Maximum value = 6

2. Maxima at x = 2, Maximum value = 2

3. Minima at x=0, minimum value = 6

4. Minima at x=2, minimum value = 6

Q.

if f(x)=x cos x, find f"(x), or $\frac{d^{2}y}{d{x}^2}$

1. - xsinx + cosx

2. - xcosx - 2sinx

3. xsinx - cosx

4. none of these

Q. The double derivative at a local minimum is

1. = 0
2. > 0
3. < 0
4. < = 0

Q.

Find the derivative of $y=sin(x^2-4)$

1. $2xcos(x^2-4)$

2. $2xcos{x}^2$

3. $xcos(x^2-4)$

4. none of these