HP 35s Quick Start Manual page 37

accuracy of a result, which also affects the time taken to get a
result. FIX 2 returns a result much faster than SCI 9, but it is also
less precise.
For example, to integrate 1/X from 1 to 4, press
d,hXÏ to enter expression in the equation cata-
log. The expression appears in the catalog as shown in the dis-
play. INV(X) is how the solver shows the , function.
Press d to leave the equation catalog.
To integrate the expression, in either mode, the lower and upper
limits of integration must be specified. First press 1Ï4
and then d¹". At this point, the display appears as
shown below.
Specify the variable of integration, in this case, the variable X,
Figure 28
Figure 29
Getting Started 33