Texas Instruments TI-89 Manual Book page 453

deSolve(2ndOrderOde and boundaryCondition1 and
boundaryCondition2, independentVar,
dependentVar)
Returns a particular solution that satisfies
2ndOrderOde
different points.
det()
MATH/Matrix menu
det(squareMatrix[, tol])
Returns the determinant of
Optionally, any matrix element is treated as
zero if its absolute value is less than
tolerance is used only if the matrix has
floating-point entries and does not contain
any symbolic variables that have not been
assigned a value. Otherwise,
If you use ¥ ¸ or set the mode to
Exact/Approx=APPROXIMATE
are done using floating-point arithmetic.
If is omitted or not used, the default
tol
tolerance is calculated as:
5 ë 14 ù max(dim(squareMatrix))
E
ù rowNorm(squareMatrix)
diag()
MATH/Matrix menu
diag(list)
matrix
diag(rowMatrix)
diag(columnMatrix)
Returns a matrix with the values in the
argument list or matrix in its main diagonal.
diag(squareMatrix)
Returns a row matrix containing the
elements from the main diagonal of
squareMatrix
squareMatrix
436 Appendix A: Functions and Instructions
a particular solution
and has specified values at two
expression
squareMatrix
tol
is ignored.
tol
, computations
matrix
matrix
rowMatrix
.
must be square.
deSolve(w''ì 2w'/x+(9+2/x^2)w=
xù e^(x) and w(p/6)=0 and
w(p/3)=0,x,w) ¸
det([a,b;c,d]) ¸
.
det([1,2;3,4]) ¸
det(identity(3) ì xù [1,ë 2,3;
. This
ë 2,4,1;ë 6,ë 2,7]) ¸
ë (98ø xò ì 55ø xñ + 12ø x ì 1)
[1 20,1;0,1]!mat1
E
det(mat1) ¸
det(mat1,.1) ¸
diag({2,4,6}) ¸
[4,6,8;1,2,3;5,7,9] ¸
diag(ans(1)) ¸
p
øxøcos(3øx)
e 3
w=
10
p
øxøsin(3øx)
e 6
x e
ì
+
10 10
aø d ì bø c
ë 2
1. 20 1
E
[ ]
0 1
0
1. 20
E
2 0 0
0 4 0
0 0 6
4 6 8
1 2 3
5 7 9
[4 2 9]
x