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Maxima and Minima of a Function is considered one the most difficult concept.
57 Questions around this concept.
Let $f(x)=x^3-x^2+x$ then number of points which are either local maxima or local minima is ?
If m and M are the minimum and the maximum values of
then M−m is equal to :
The maximum volume (in cu.m) of the right circular cone having a slant height of 3 m is:
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Let the tangents drawn to the circle, $x^2+y^2=16$ from the point $P(0, h)$ meet the $x$ axis at points A and B. If the area of $\triangle A P B$ is minimum, then n is equal to :
If x= -1 and x = 2 are extreme points of then
Let be such that the function f given by
has extreme values at x = –1 and x = 2.
Statement 1: f has a local maximum at x = –1 and at x = 2.
Statement 2 : .
A wire of length 2 units is cut into two parts which are bent respectively to form a square of side=x units and a circle of radius=r units. If the sum of the areas of the square and the circle so formed is minimum, then :
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Which of the following graphs represents local maximaa at x = a
$\mathrm{f\left ( x \right )= x^{3}-3x+4}$ has local minimum at
Which is the correct for the following figure
Maxima and Minima of a Function
Let $y=f(x)$ be a real function defined at $x=a$. Then the function $f(x)$ is said to have a maximum value at $x=a$ if $f(x) \leq f(a) \quad \forall a \in R$.
And also the function $f(x)$ is said to have a minimum value at $x=a$, if $f(x) \geq f(a) \quad \forall a \in R$
Concept of Local Maxima and Local Minima
The function $f(x)$ is said to have local maxima (or maxima) at a point 'a' if the value of $f(x)$ at ' $a$ ' is greater than its values for all $x$ in a small neighbourhood of ' $a$ '. In other words, $f(x)$ has a maxima at $x=$ ' $a$ ', if $f(a+h) \leq f(a)$ and $f(a-h) \leq f(a)$, where $h>0$ (very small quantity).
The function $f(x)$ is said to have local minima (or minima) at a point 'b' if the value of $f(x)$ at 'b' is less than its values for all $x$ in a small neighbourhood of 'b'. In other words, $f(x)$ has a maximum at $x=$ 'b', if $f(b+h) \geq f(b)$ and $f(b-h) \geq f(b)$, where $h>0$ (very small quantity).
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