HP -225 Owner's Manual page 176

Scientific calculator
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Example: A Local "Flat" Region. Find the root of the equation:
x — 1 x 10190 = 0
SOLVE Equation: X-1E180=0
Keys:
Display:
Description:
1
X
No root found using
2 @(soLVE]
NO ROOT FND
guesses 1 and 2.
2.0000
Displays final estimate
of x.
B(LasT)
-1.00BBE100
Value of f(x) at x=2.
1
X
No root found.
2 () BBSOLVE
NO ROOT FND
-2.0000
Final estimate and f(x).
B(LAsT)
-1.0000E100
f(x)
t
}
i
}
t
X
-2
-1
1
2
3
fix) = x — 1 x 10100
168
B: More About Solving Equations

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