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HP50g or other: U. of Houston calc exams
08-09-2015, 04:49 PM (This post was last modified: 08-09-2015 05:35 PM by Hlib.)
Post: #15
RE: HP50g or other: U. of Houston calc exams
(08-05-2015 04:58 AM)Peter Murphy Wrote:  .........
I'd be interested in seeing solutions to 2015 problem 23, and to any other problems whose solutions you think might help users of the 50g get better at using it.

19. Give the value of "a" for which the system below has a solution (Calculator Exam – 2015)
2x -3y = 6 - 7a
-3x + 5y = 7+ 2a
7x +11y = 4 - 6a

Solution was based on the Kronecker-Capelli theorem and its consequences.

Code:
 flags: -2,-3,-55,-105 clear -117 set

2 -3 -3 5 7 11 {3 2} →ARRY DUP RANK SWAP
[′6-7*a′ ′7+2*a′ ′4-6*a′] 3 COL+ DET = ′a′ ZEROS

a=707/384

If I wasn't wrong.
Edit 1: sorry, this is incorrect. I will think
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RE: HP50g or other: U. of Houston calc exams - Hlib - 08-09-2015 04:49 PM



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