More about Solving
D–9
File name 33s-E-Manual-1008-Publication(1st).doc Page : 386
Printed Date : 2003/10/8 Size : 13.7 x 21.2 cm
f (x)
x
a
f (x)
x
b
f (x)
x
c
Case Where No Root Is Found
The SOLVE operation returns a math error if an estimate produces an operation
that is not allowed — for example, division by zero, a square root of a negative
number, or a logarithm of zero. Keep in mind that SOLVE can generate estimates
over a wide range. You can sometimes avoid math errors by using good guesses.
If a math error occurs, press
h
unknown variable (or
º
È
variable) to
see the value that produced the error.
Example: A Relative Minimum.
Calculate the root of this parabolic equation:
x
2
– 6x + 13 = 0.
It has a minimum at x = 3.
Enter the equation as an expression:
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