Matlab - Necesito ayuda con la suma de las inversas de la serie de fibonacci

>> clear all

format rat

x(1)=1;

x(2)=1;

X(1)=1/x(1);

X(2)=1/x(2);

s=X(1)+X(2);

for i=3:10

    x(i)=x(i-1)+x(2);

    X(i)=1/x(i);

    s=s+X(i);

end

x

X

s

x =

  Columns 1 through 7

       1              1              2              3              4              5              6

  Columns 8 through 10

       7              8              9

X =

  Columns 1 through 7

       1              1              1/2            1/3            1/4            1/5            1/6

  Columns 8 through 10

       1/7            1/8            1/9

s =

    2485/649