TI -86 用户手册
Chapter 20: A to Z Function and Instruction Reference
309
20ATOZ.DOC TI-86, Chap 20, US English Bob Fedorisko Revised: 02/13/01 2:42 PM Printed: 02/13/01 3:05 PM Page 309 of 118
20ATOZ.DOC TI-86, Chap 20, US English Bob Fedorisko Revised: 02/13/01 2:42 PM Printed: 02/13/01 3:05 PM Page 309 of 118
inter(
† MATH menu
inter(
x1
,
y1
,
x2,y2
,
xValue
)
Calculates the line through points (x1,y1) and (x2,y2)
and then interpolates or extrapolates a
and then interpolates or extrapolates a
y
value for the
specified xValue.
Using points (3,5) and (4,4), find the y value at
x=1:
x=1:
inter(3,5,4,4,1) b
7
inter(
y1
,
x1
,
y2,x2
,
yValue
)
Interpolates or extrapolates an
x
value for the specified
yValue
. Notice that points (x1,y1) and (x2,y2) must be
entered as (y1,x1) and (y2,x2).
Using points (
L4,L7) and (2,6), find the x value
at y=10:
inter(
L
7,
L
4,6,2,10) b
3.84615384615
Inverse:
L
1
-
ƒ
number
L
1
or
(
expression
)
L
1
Returns 1 divided by a real or complex number, where
number
number
ƒ 0.
5
L1
b
.2
(10¹6)
L1
b
.016666666667
list
L
1
Returns a list in which each element is 1 divided by the
corresponding element in list.
corresponding element in list.
{
L.5,10,2/8}
L1
b
{
L2 .1 4}
squareMatrix
L
1
Returns an inverted squareMatrix, where det
ƒ 0.
[[1,2][3,4]]
L1
b
[[
L2 1 ]
[1.5
L.5]]
iPart
MATH NUM menu
iPart
number
or
iPart (
expression
)
Returns the integer part of number or expression. The
argument can be real or complex.
argument can be real or complex.
iPart 23.45 b
23
iPart
L
23.45 b
L
23