Find the derivative of y=ln(x2+1)y = \\ln(x^2 + 1)y=ln(x2+1).
frac2xln(x2+1)\\frac{2x}{\\ln(x^2+1)}frac2xln(x2+1)
2xln(x2+1)2x \\ln(x^2+1)2xln(x2+1)
frac2xx2+1\\frac{2x}{x^2+1}frac2xx2+1
frac1x2+1\\frac{1}{x^2+1}frac1x2+1