# How to integrate a function using scientific calculator (Definite Integral)

## Model : CASIO fx-570MS, CASIO fx-991MS

The calculator can easily perform definite integration (integration with the limit). Mainly three inputs are required for the operation. They are a function of variable x, lower limit, upper limit.

Example: What is the value of ∫

_{2}

^{5}(x

^{3}-5x-3) dx?

Options: a) 129/12, b) 363/4, c) 65/7, d) 1/2

Solution:

∫dx >> ALPHA >> ) >> SHIFT >> x

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

(363/4=90.75,so ans is option b))

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