Thread: Simple Linear Algebra Question

Equation:

Step 1:

My question concerns this step. To isolate the variable "t" you divide by 3. It seems that should read however that leads to an incorrect answer. The correct way to do this apparently is . Why do you multiply by 1/3? When you isolate "t" you divide by 3.


Thanks for the clarification.

Originally Posted by allyourbass2212

My question concerns this step. To isolate the variable "t" you divide by 3. It seems that should read

No, here you are trying to divide by not 3. Dividing by three is the same as multiplying by one-third:

Originally Posted by Reckoner

No, here you are trying to divide by not 3. Dividing by three is the same as multiplying by one-third:

Thanks, to be clear then this is for all linear algebra for instance

Equation:
Step 1:

Originally Posted by allyourbass2212

Equation:
Step 1:

Correct. You could work this either way, by dividing both sides by 2 or by multiplying both sides by the reciprocal You get the same result regardless.

attraction signs





tutorial.math.lamar.edu/Classes/LinAlg/LinAlg.aspxHere are my online notes for my Linear Algebra course that I teach here at ... Sometimes a very good question gets asked in class

Simple linear algebra is a integrated part of mathematics. sometimes students ask a difficult and logical questions in the class.

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