HP 49g+ User Manual page 76

Graphing calculator
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At an editing point, use the delete key (ƒ) to trigger the insertion
cursor and proceed with the edition of the expression.
To see the clear editing cursor in action, let's start with the algebraic
expression that we entered in the exercise above:
Press the down arrow key, ˜, at its current location to trigger the clear
editing cursor. The 3 in the exponent of θ will be highlighted. Use the left
arrow key, š, to move from element to element in the expression. The order
of selection of the clear editing cursor in this example is the following (press
the left arrow key, š, repeatedly):
1. The 1 in the 1/3 exponent
2. θ
3. ∆y
4. µ
5. 2
6. x
7. µ in the exponential function
8. λ
9. 3 in the √3 term
10. the 2 in the 2/√3 fraction
At any point we can change the clear editing cursor into the insertion cursor
by pressing the delete key (ƒ). Let's use these two cursors (the clear editing
cursor and the insertion cursor) to change the current expression into the
following:
If you followed the exercise immediately above, you should have the clear
editing cursor on the number 2 in the first factor in the expression. Follow
these keystrokes to edit the expression:
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