Limits


Press MENU 9 to access the CAS menu. Then press F2 to access the CALC menu. Press 3 to select 3:lim. Alternatively, after pressing F2, highlight 3:lim, then press EXE. Use the syntax:

limit(expression,variable,value)

Value may be a real number or infinity.

For example, to find , after lim( in the entry line, type:

X ^ 2 – 2 X – 3 , X , 1 ) EXE

The limit is -4.

To find , after lim( in the entry line, type:

1 X , X , OPTN F1 ) EXE

Note that OPTN F1 pastes into the entry line. The limit is 0.

After using OPTN, press ESC to return to the main CAS menu.

One also can determine one-sided limits by using the syntax: limit(expression,variable,value,n). To determine a left-sided limit, insert a negative number for n. To determine a right-sided limit, insert a positive number for n. For example, to find , after lim( in the entry line, type:

1 ( X - 4 ) , X , 4 , 1 ) EXE

The limit is infinity.