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  ∫₂⁵(x³-5x-3)dx ?
              Options: a) 129/12, b) 363/4, c) 65/7, d) 1/2


Solution:

∫dx >> ALPHA >> ) >> SHIFT >> x² >> - >> 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.