In Algeabra I and can't add???
Posted Sep30-09 at 01:05 AM by Integral
I finally got to help students in the math class. I was not surprised at the lack of motivation to work when left to their own devices but I was shocked at the pair a gals that when presented with the problem
10 + 2.5 * 2
came up with 6 as a answer and didn't even feel that it might be wrong.
In the electronics class we started building simple LED circuits.
One fellow couldn't get his Led to light. Voltage measurements showed that the LED was correct but we were dropping nearly source voltage across the 100 Ohm resistor?????
Closer inspection reveled that the 3rd band was not brown but a dark blue, on a 1/4W resister it can be very hard to tell the difference between some of the darker colors.
10 + 2.5 * 2
came up with 6 as a answer and didn't even feel that it might be wrong.
In the electronics class we started building simple LED circuits.
One fellow couldn't get his Led to light. Voltage measurements showed that the LED was correct but we were dropping nearly source voltage across the 100 Ohm resistor?????
Closer inspection reveled that the 3rd band was not brown but a dark blue, on a 1/4W resister it can be very hard to tell the difference between some of the darker colors.
Total Comments 3
Comments
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Not unusual;older student talking from prev logic classroom on higher ed at EastKent tech some yrs ago. I/weput amplifiers in the wrong way round.CRO showed it up.Good job it wasnt the job proper.Posted Oct2-09 at 07:08 AM by chascomm 
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are you crazy???
try this...
let a=b=5
a^2=ab.......true
a^2-b^2=ab-b^2.....true
(a+b)(a-b)=a(a-b)......true
dividing both sides by (a-b),we get..
a+b=a......false
this concept is all your application my dear.....Posted Oct16-09 at 08:18 AM by sridharsharma
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dividing both sides by a-b is dividing my zero....tst tsk...
Posted Nov2-09 at 03:05 PM by Biophreak
