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Is it possible to make t the subject of x=t^3-8t? watch

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    (Original post by Xin Xang)
    That seems a bit much.

    Are you suggesting that a poster who has repeatedly trolled the maths forum should not be banned ... Even after previous warning
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    (Original post by Mr M)
    He's been at it all day.
    And on previous days
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    (Original post by Mr M)
    He's been at it all day.
    (Original post by TenOfThem)
    Are you suggesting that a poster who has repeatedly trolled the maths forum should not be banned ... Even after previous warning
    (Original post by TenOfThem)
    And on previous days
    Ok sorry I didn't know. It sounded as if they were being banned for questioning James22's maths ability from what I could gather.
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    S'pose I'll get clearing up
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    :wavey:
    (Original post by Nirgilis)
    S'pose I'll get clearing up
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    (Original post by TenOfThem)
    :wavey:
    :hi: . Don't think we've had this many reports in such a small amount of time since the last exam period :lol:
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    (Original post by Nirgilis)
    :hi: . Don't think we've had this many reports in such a small amount of time since the last exam period :lol:
    Did you clear up the other thread inferred too?
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    (Original post by TenOfThem)
    Did you clear up the other thread inferred too?
    Just getting round to it :yep: . Seems your reports from yesterday still need attention too, looking at the logs :rolleyes: . I'll deal with everything now
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    (Original post by TenOfThem)
    That is not the reason

    If x=t+3 then we could rearrange to get t=x-3
    Well. The same is possible for the equation above to get a general one. But as far as I can see the parameter t would be both on the right and on the left side then. That is to say there is not a concrete value for parameter t, there are more than one. So there are different values of t for the same value of variable x. Is that the reason?
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    (Original post by Xin Xang)
    Ok sorry I didn't know. It sounded as if they were being banned for questioning James22's maths ability from what I could gather.
    Can this be a new rule?
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    (Original post by Kallisto)
    Well. The same is possible for the equation above to get a general one. But as far as I can see the parameter t would be both on the right and on the left side then. That is to say there is not a concrete value for parameter t, there are more than one. So there are different values of t for the same value of variable x. Is that the reason?
    That is exactly the reason.
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    (Original post by Xin Xang)





    That is only 1 of 3 poossible solutions.
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    (Original post by james22)
    That is only 1 of 3 poossible solutions.
    But it is possible to make t the subject as I have shown (cut and pasted), correct?
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    (Original post by Xin Xang)
    But it is possible to make t the subject as I have shown (cut and pasted), correct?
    No, because t can take 3 possible values. You only gave 1 of them. Rearanging should not lose information, but losing 2/3 solutions is losing information.
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    (Original post by james22)
    No, because t can take 3 possible values. You only gave 1 of them. Rearanging should not lose information, but losing 2/3 solutions is losing information.
    I think you should look at post 18
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    (Original post by TeeEm)
    I think you should look at post 18
    I don't consider something to be a rearangement unless all steps are reversable. Rearangement should be an equivalence relation, and it cannot be so if information is lost.
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    (Original post by james22)
    I don't consider something to be a rearangement unless all steps are reversable. Rearangement should be an equivalence relation, and it cannot be so if information is lost.
    Can you rearrange y=x2 for x?
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    (Original post by TeeEm)
    Can you rearrange y=x2 for x?
    No, not without restrictions on what values x can take.
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    (Original post by james22)
    No, not without restrictions on what values x can take.
    I have nothing else to say ...
 
 
 
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