Factor_Base_Index - Texas Instruments TI-89 Developer's Manual

Appendix A: System Routines — Algebra Utilities

factor_base_index

Declaration: EStackIndex factor_base_index (EStackIndex k )
Category(ies): Algebra Utilities
Description: If k indexes an exponentiation tag, returns the index of the base. Otherwise
returns k .
k — Index of the top tag of an algebraic expression.
Inputs:
If k indexes an exponentiation tag, returns the index of the base. Otherwise
Outputs:
returns k .
Assumptions: None
Side Effects: None
Availability: All versions of the TI-89 / TI-92 Plus.
TI-89 / TI-92 Plus
Differences: None
See Also: factor_exponent_index
Example:
EStackIndex lead_base_index (EStackIndex i)
/* Returns the index of the lead base of any algebraic expression indexed by i. */
{ return factor_base_index (lead_factor_index (i));
}
TI-89 / TI-92 Plus Developer Guide Not for Distribution
235
Beta Version January 26, 2001