Jomo's calculator

  • Thread starter Deleted member 4993
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Deleted member 4993

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Jomo said:
Inverses are things you do with a calculator. Imagine after a long time of making calculations you have a number in your calculator and by mistake you multiply this number by 5. Now you don't remember the number. You have to ways of obtaining that number. You can start from the beginning of the calculations you need to make OR you can think of a better way to obtain that number which you multiplied by 5. How do you undo multiplying by 5? You divide by 5. You take this unknown number, which we will call x, and divide it by 5. That is the inverse function is x/5.

Sure you can do this in a mechanical way like Subhotosh Kahn suggested or you can think about it>

Here are some examples:
The inverse of x+2 is x-2, the inverse of x-7 is x+7, the inverse of x/3 is 3x. Do you see the pattern?
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Jomo said:
Inverses are things you do with a calculator.
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Then Jomo is immediately disqualified - he does have one and does not know what to do with those....
 
Subhotosh Khan said:
Then Jomo is immediately disqualified - he does have one and does not know what to do with those....
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Yes, I do have a calculator but do not know where it is. These days we have WA and a host of other online access to calculators so a handheld one is outdated. I just do not use a calculator or online software to do calculations which I can do in my head which I can do more of every day through practice.
 
Jomo said:
Yes, I do have a calculator but do not know where it is. These days we have WA and a host of other online access to calculators so a handheld one is outdated. I just do not use a calculator or online software to do calculations which I can do in my head which I can do more of every day through practice.
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Are you kidding me? I LOVE my TI-92! (It is tough to fit into a pocket, I'll admit.)

-Dan
 
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