Tuesday, November 13, 2012

Solving Online Absolute Minimum

Learn solving absolute minimum online:

The function f given by f(x) = x, x (0,1) has neither a maximum nor  a minimum value. If we replace (0,1) by the closed interval [0,1], then the function has a maximum value 1=f(1) and the minimum value 0 = f(0). This reveals the emphasis to be put on the interval on which the given function is defined. We could also note that, in the interval [0,1], f has neither a point of local maxima nor a point of local minima and so f has neither a local maximum value nor a local minimum value even though maximum and minimum values of f exists.

The maximum value 1 of f at x = 1 is called the absolute maximum value (greatest value ) of f on [0,1] and the minimum value 0 of f at x = 0 is called the absolute minimum value (least value) of f on [0,1].

Learn Theorems Used in Solving Absolute Minimum Online:

Let f be a continuous function on an interval I = [a,b]. Then, f has the absolute maximum value and f attains it at least once in I. Also, f has the absolute value and attains it at least once in I.

Let f be a differentiable function on I and let x0 be any interior point of I. then

1. If f attains its absolute maximum value at x0, then f ‘ (x0) = 0

2. If f attains its, then  absolute minimum value at x0, then f ‘ (x0) = 0

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Learn Rules in Solving Absolute Minimum Online:

We use the following rules to find the absolute maximum and minimum values of a function in a given interval.

Find all the points where f ’ takes the value zeros.
Take the endpoints of the interval
At all these points calculate the values of f.
Take the maximum and minimum values of f out of the values calculated in step 3. These will be the absolute maximum or minimum values.

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