# Maxima and Minima

## Class Activity 1 - Do Try 9 (i) on writing paper

## Move Point D to change the length of x

## Try 9 (i) cont'

Plot the function for the area of rectangle (Use )

## Try 9 (ii)

Calculate the value of x for which A has a stationary value. x=

Is this a max or minimum point ?

## Class Activity 2 - Read Example 10 below

## Class Activity 3 - Visualize the folding box based on above example

## Class Activity 4 - Do Try 10 (i) on writing paper

## Try 10 (i) cont'

Plot the function for the volume of the box. (Use y instead of V)

## Try 10 (ii)

Calculate the value of x for which V has a stationary value. x=

Is this a Max or min point ?