HP 35s HP 35s scientific calculator - User Guide - Page 330
When SOLVE Cannot Find a Root
UPC - 000000000000
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Now, solve to find the root. Keys: X Display X Checksum and length. Cancels Equation mode. Description: Your initial guesses for the root. Selects Equation mode; displays the equation. No root found for f(x). When SOLVE Cannot Find a Root Sometimes SOLVE fails to find a root. The following conditions cause the message The search terminates near a local minimum or maximum (see figure a, below). The search halts because SOLVE is working on a horizontal asymptote-an area where f(x) is essentially constant for a wide range of x (see figure b, below). The search is concentrated in a local "flat" region of the function (see figure c, below). In these cases, the values in the stack will be same as the values before executing SOLVE. D-8 More about Solving