Seq; Seqgen - Texas Instruments TI-Nspire Reference Manual

seq()

Expr Var Low High
seq( , , , [,
Increments Var from Low through High by an increment of Step,
evaluates Expr, and returns the results as a list. The original contents
of Var are still there after seq() is completed.
=
The default value for Step

seqGen()

seqGen(Expr, Var, depVar, {Var0, VarMax}[, ListOfInitTerms
[, VarStep [, CeilingValue]]])
Generates a list of terms for sequence depVar(Var)=Expr as follows:
Increments independent variable Var from Var0 through VarMax by
VarStep, evaluates depVar(Var) for corresponding values of Var
using the Expr formula and ListOfInitTerms, and returns the results
as a list.
seqGen(ListOrSystemOfExpr, Var, ListOfDepVars, {Var0, VarMax}
[, MatrixOfInitTerms [, VarStep [, CeilingValue]]])
Generates a matrix of terms for a system (or list) of sequences
ListOfDepVars(Var)=ListOrSystemOfExpr as follows: Increments
independent variable Var from Var0 through VarMax by VarStep,
evaluates ListOfDepVars(Var) for corresponding values of Var using
ListOrSystemOfExpr formula and MatrixOfInitTerms, and returns
the results as a matrix.
The original contents of Var are unchanged after seqGen() is
completed.
The default value for VarStep = 1.
⇒
Step list
])
1.
⇒
list
⇒
Press +
Ctrl Enter
evaluate:
Generate the first 5 terms of the sequence u(n) = u(n-1)
with u(1)= and VarStep=
2
matrix
Example in which Var0=2:
System of two sequences:
Note: The Void (_) in the initial term matrix above is used to
indicate that the initial term for u1(n) is calculated using the
explicit sequence formula u1(n)=1/n.
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