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//ques21
disp('Taylor series');
disp('f(x+h)=f(x)+hf1(x)+h^2/2!*f2(x)+h^3/3!*f3(x)+......');
disp('To finf the taylor expansion of tan-1(x+h)')
syms x h
y=atan(x);
n=input('enter the number of expression in seris : ');
t=y;
for i=2:n
y1=diff(y,'x',i-1);
t=t+h^(i-1)*(y1)/factorial(i-1);
end
disp(t)
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