Question

if f(x)=x-1/x+1,then its differntial is given by​

Answer 1

Answer:

f ' (x) =

$\frac{(x + 1) \times 1 - (x - 1) \times 1}{(x + 1) {}^{2} } = \frac{2}{(x + 1) {}^{2} }$