HP 48G - Manual (Page 57)

S t e p S : Since R A T F U N C only has one variable, it must be the
unknown variable. Solve for x by highlighting its field and
pressing S 0 L V E.
(T) S O L V E EQUftTIDN^^«
EOr ' 6^<.x'-2-9}+4y<6+x-
EHTEf; VfltUE BR PREii iOLVE _________
S t e p J , :
Press I N F O to determine the nature of the most recent
solution found by the root-finder. The Zero message
indicates that the solver found a solution—a point where the
expression evaluates to “exactly” (that is, to 12 significant
digits) zero.
SOLVE EGUftTION
EG: .¿x(;x-'-2-9)+4r <6+x
I
x: 1 . 5
Zero
ENTER VRLUE DR PRESS SOLVE
S t e p 5 :
Press to remove the message box.
Searching for Multiple Solutions
Although an equation or expression may have more than one solution,
the calculator stops when it finds one. Because there was no value
listed for X before you chose to solve for ,r, the solver began looking
for an answer at r = 0 and reported the first solution it found.
However, you can tell the solver to begin its search from a different
point by entering an
e s t i m a t e
of the solution before solving for a
variable.
Exaiiiiile: Re-solve
R A T F U N C
beginning with a guess of a- = -2.
Solving Equations 5-3