Question

derivative of
$2. \sqrt{1 - x}$

Answer 1

Let f(x) = 2 √(1-x)

f'(x) = d/dx [ 2 √(1-x) ]

= 2 d/dx ( √1-x) * d/dx(1-x)

= 2* 1/2 * 1/√(1-x) * -1

= $\frac{-1}{ \sqrt{1 - x} }$

Hope helped !