HP 35s HP 35s scientific calculator - User Guide - Page 335
Round-Off Error, More about Solving, In RPN mode, Display, Description
UPC - 000000000000
View all HP 35s manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 335 highlights
Solve for X using initial guesses of 10-8 and -10-8. Keys: (In RPN mode) Display: Description: X J X Enters guesses. Selects program "J" as the function. Solves for X; displays the result. Round-Off Error The limited (12-digit) precision of the calculator can cause errors due to rounding off, which adversely affect the iterative solutions of SOLVE and integration. For example, [( x + 1) + 1015]2 - 1030 = 0 has no roots because f(x) is always greater than zero. However, given initial guesses of 1 and 2, SOLVE returns the answer 1.0000 due to round-off error. Round-off error can also cause SOLVE to fail to find a root. The equation x2 - 7 = 0 has a root at 7 . However, no 12-digit number exactly equals 7 , so the calculator can never make the function equal to zero. Furthermore, the function never changes sign SOLVE returns the message More about Solving D-13