Find the local maximum and local minimum values for the function given by $g(x) = x^{3} - 3x$.

Vedclass pdf generator app on play store
Vedclass iOS app on app store
(A) Given function: $g(x) = x^{3} - 3x$.
First,find the derivative: $g'(x) = 3x^{2} - 3$.
To find critical points,set $g'(x) = 0$:
$3x^{2} - 3 = 0 \Rightarrow 3(x^{2} - 1) = 0 \Rightarrow x^{2} = 1 \Rightarrow x = \pm 1$.
Now,find the second derivative: $g''(x) = 6x$.
Apply the second derivative test:
For $x = 1$: $g''(1) = 6(1) = 6 > 0$. Since $g''(1) > 0$,$x = 1$ is a point of local minima.
The local minimum value is $g(1) = (1)^{3} - 3(1) = 1 - 3 = -2$.
For $x = -1$: $g''(-1) = 6(-1) = -6 < 0$. Since $g''(-1) < 0$,$x = -1$ is a point of local maxima.
The local maximum value is $g(-1) = (-1)^{3} - 3(-1) = -1 + 3 = 2$.

Explore More

Similar Questions

If $f(x) = ax + \frac{b}{x}$ where $a, b, x > 0$,then the value of $x$ for which $f(x)$ is minimum is:

Prove that the function $f(x) = e^{x}$ does not have any maxima or minima.

Find two positive numbers $x$ and $y$ such that their sum is $35$ and the product $x^{2} y^{5}$ is a maximum.

Difficult
View Solution

The lateral edge of a regular rectangular pyramid is $a \text{ cm}$ long. The lateral edge makes an angle $\alpha$ with the plane of the base. The value of $\alpha$ for which the volume of the pyramid is greatest,is

The function $f(x) = 2x^3 - 9ax^2 + 12a^2x + 1$ where $a > 0$ attains its local maximum and local minimum at $p$ and $q$ respectively. If $p^2 = q$, then $a =$

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo