Which of these is the Taylor series of f(x)=x2f(x)=x^2f(x)=x2 at a=1a=1a=1?
1+2(x−1)+(x−1)21 + 2(x-1) + (x-1)^21+2(x−1)+(x−1)2
1+(x−1)+(x−1)21 + (x-1) + (x-1)^21+(x−1)+(x−1)2
x2x^2x2
2x2x2x