How to correctly write this function?(matlab) -

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input:

syms x b c; piem=((c+a*x+b*x^(1/2))/(x-1)-1); solve(piem,x) pretty(solve(piem,x))   f2=arcsin(sqrt(x(x^2-1))); df2=diff(arcsin(sqrt(x(x^2-1)))); x=1:0.1:13; y=eval(f2); dy=eval(df2); plot(x,y,x,dy)

this function supposed like

function

i don't understand why part isn't working 

f2=arcsin(sqrt(x(x^2-1))); df2=diff(arcsin(sqrt(x(x^2-1)))); x=1:0.1:13; y=eval(f2); dy=eval(df2); plot(x,y,x,dy)

as understand error there wrong part

arcsin(sqrt(x(x^2-1)))

how can write 1 in different way?

matlab not perform implicit multiplication when encounters parenthesis. instead need explicitly perform multplication using *.

also, want asin not arcsin.

asin(sqrt(x * (x^2-1)))

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