##
__How to integrate a
function (Definite Integral)__

__How to integrate a function (Definite Integral)__

**Tricks applicable for Calc Model**: CASIO fx-570MS, CASIO fx-991MS, and other similar operation model.

###
**What is Integration?**

-Integration is the act of bringing together smaller components
into a single system that functions as single unit.

-Integration can be used to find Areas, Volumes, etc.

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**What is definite
integral?**

-A definite integral has start and end values (ie Limit), in
other word there is an interval (a to b).

-Integration in this case takes place in a limit of the
interval.

Calculator can easily perform definite integration (ie
integration with limit).

Mainly three inputs are required for the operation. They are a

**function with variable x**,**lower limit**, and**upper limit**.
We can understand the trick easily with following example, so
let start…

**Example:**What is the value of_{2}**∫**is?^{5}(x^{3}-5x-3)dx**a) 129/12**

**b) 363/4**

**c) 65/7**

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**Solution:**

STEPS:∫dx >> ALPHA >> ) >> SHIFT >> x

^{2}>> - >> 5 >> ALPHA >> ) >> - >>3 >> , >> 2(lower limit first) >> , >> 5(upper limit second) >> ) >> =(90.75)

(363/4=90.75,so Answer is option

**b**)

**Note:**For two or three function multiplication use bracket for each function. Internal integration calculations may take considerable time to complete.

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