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Math Help - can any one help me with thissss ?????

  1. #1
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    Post can any one help me with thissss ?????

    find the value of "a" and "b" that makes this function continous



    5b-3aX -4≤X<-2
    F(X)= 4X+1 -2≤X≤2
    aX˛+17b 2<X≤4


    my exam is tomorrow plz wish me good luck
    Last edited by mohamedsafy; November 26th 2008 at 02:31 AM.
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  2. #2
    Like a stone-audioslave ADARSH's Avatar
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    Hello,Mohamed Safy
    Quote Originally Posted by mohamedsafy View Post
    find the value of "a" and "b" that makes this function continous



    5b-3aX -4≤X<-2
    F(X)= 4X+1 -2≤X≤2
    aX˛+17b 2<X≤4


    my exam is tomorrow plz wish me good luck
    for the function to b continious graph should have no breaks
    so
     <br />
5b-3a~*~-2= 4~*~-2~+~1<br />
    And
     <br />
4~*~2~+~1=a~*~2^2~+~17b<br />
    The corresponding a and b are your answers
    AND ALL THE BEST for tommorow
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  3. #3
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    thanks soo much

    rally thank u but... i didnt get it clearly but iknow ifwe want to fnd 2nkowns "a" and "b" we have to find two equations and solve them together
    what i wanted to get is how can i get these two equations ??? and everything ill be easy to me
    and thx for the reply
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  4. #4
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    oh

    oh now i know what u wanted to say i didnt get it coz te sympols
    but i still didnt get how did u find those equations
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  5. #5
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    Quote Originally Posted by mohamedsafy View Post
    oh now i know what u wanted to say i didnt get it coz te sympols
    but i still didnt get how did u find those equations
    First equation: You require the value of 5b-3aX at x = -2 to be the same as the value of 4X+1 at x = -2.

    Second equation: You require the value of 4X+1 at x = 2 to be the same as the value of aX˛+17b at x = 2.
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  6. #6
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    thx

    thank u mr fantastic u r really fantastic
    Last edited by mr fantastic; December 27th 2008 at 05:44 AM. Reason: Deleted excessive use of smilies.
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