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Math Help - need help with maple software please

  1. #1
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    need help with maple software please

    given :
    J(n)=b*A(n)
    S(n+1)=j*J(n)
    A(n+1)=s*S(n) + a*A(n)

    b=0.5
    a=0.7 , A(0)=70
    j=0.75 , J(0)=75
    s=0.8 , S(0)=80

    n is integer

    write a procedure to find A(5)=? , J(5)=? , S(5)=?
    Last edited by allant; March 28th 2012 at 11:35 AM.
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  2. #2
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    Re: need help with maple software please

    This does it.

    J:=proc(n)
    if n=0 then return 75;
    else (1/2)*A(n);
    end if;
    end proc:
    A:=proc(n)
    if n=0 then return 70;
    else S(n-1)*(8/10)+(7/10)*A(n-1);
    end if;
    end proc:
    S:=proc(n)
    if n=0 then return 80;
    else (3/4)*J(n-1);
    end if;
    end proc:
    A(5), J(5), S(5);
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