Error in fsolve function

syms x a
series(x)=sym(zeros(1));
Y=sym(zeros(1));
m=sym(1);
Y(1)=0;
Y(2)=a;
%N=input ('enter the number of coefficient required')
for k=1:6          
    Y(k+2)=((18*kroneckerDelta(k,m)-9*Y(k)))/(k*(k+1));
end
disp(Y)
for  k=1:6
    series(x)=series(x)+Y(k)*(power(x,k-1));
end
series
M=series(pi/2)-1
a=fsolve(M,0)

The last line is showing error and further i just want to evaluate the series by putting value of a by using command .But again getting error

[Catalytic]

We are not sitting next to you at your computer. We cannot see the error messages that you are getting.

Answer 1

[Matt J]

a=solve(M)

a = 

[yogeshwari patel]

Now how to substutite the value of a gain in series to obatin the solution in terms of x

[yogeshwari patel]

Thanks

now i use the command to substitute the value in the series but i not displaying correct answer

series

syms x a

series(x)=sym(zeros(1));

Y=sym(zeros(1));

m=sym(1);

Y(1)=0;

Y(2)=a;

%N=input ('enter the number of coefficient required')

for k=1:6

Y(k+2)=((18*kroneckerDelta(k,m)-9*Y(k)))/(k*(k+1));

end

disp(Y)

for k=1:6

series(x)=series(x)+Y(k)*(power(x,k-1));

end

series

M=series(pi/2)-1

a=solve(M)

series