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Math Help - Find A and B

  1. #1
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    Find A and B

    If f(x) = (x - B)/(x - A), f(2) = 0, and f(1) is UNDEFINED, what are the values for A and B?

    NOTE: Does the word UNDEFINED mean DOES NOT EXIST because division by zero is IMPOSSIBLE?
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by symmetry View Post
    If f(x) = (x - B)/(x - A), f(2) = 0, and f(1) is UNDEFINED, what are the values for A and B?

    NOTE: Does the word UNDEFINED mean DOES NOT EXIST because division by zero is IMPOSSIBLE?
    As you know f(x) in this case is zero when (x-B) is zero so if f(2)=0, then
    substitute 2 for x in (x-B)=0, to find B=2.

    Also if f(x) is undefined (x-A) is zero, and so if f(1) is undefined substitute
    1 for x in (x-A)=0, to find A=1.

    RonL
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  3. #3
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    ok

    I think it's an interesting question.

    Thanks!
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