Find the derivative of y=log7(x2+1)y = \log_7(x^2 + 1)y=log7(x2+1).
2x(x2+1)ln(7)\frac{2x}{(x^2+1)\ln(7)}(x2+1)ln(7)2x
1(x2+1)ln(7)\frac{1}{(x^2+1)\ln(7)}(x2+1)ln(7)1
2xx2+1\frac{2x}{x^2+1}x2+12x
2xln(7)x2+1\frac{2x \ln(7)}{x^2+1}x2+12xln(7)