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    Need help with ii),iii), and iv).
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    (Original post by Alb1)
    Need help with ii),iii), and iv).
    Part 2 - just construct 3 equations with these 3 variables A, B and C and solve this system of equations

    Part 3 - just a simple quadratic inequality for you to solve once you have A, B and C

    Part 4 - Write down the first few terms and see if you can spot a pattern
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    (Original post by RDKGames)
    Part 2 - just construct 3 equations with these 3 variables A, B and C and solve this system of equations

    Part 3 - just a simple quadratic inequality for you to solve once you have A, B and C

    Part 4 - Write down the first few terms and see if you can spot a pattern

    I got A=1/3 B=0 C=2/3 for ii) but I think I might be wrong and wanted to check if I was right or wrong before continuing.
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    (Original post by Alb1)
    I got A=1/3 B=0 C=2/3 for ii) but I think I might be wrong and wanted to check if I was right or wrong before continuing.
    That is incorrect. You can always check them yourself by running them through the original system of equations. Try again:

    x_1=1=A+B+C
    x_2=3=A+2B+4C
    x_3=7=A+3B+9C
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    (Original post by RDKGames)
    That is incorrect. You can always check them yourself by running them through the original system of equations. Try again:

    x_1=1=A+B+C
    x_2=3=A+2B+4C
    x_3=7=A+3B+9C
    Ohh I just found the stupid mistake I made, I got 1,-1,1 thanks for your help.
 
 
 
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