Find the derivative of sqrt(1 - 2x)

[From: ] [author: ] [Date: 12-06-30] [Hit: ]

f(x) = sqrt(1 - 2x).

Somehow the answer is f'(x) = -[1/sqrt(1-2x)].

Please help.

y = √(1 - 2x)

dy/dx = [ 1/ 2√(2 - x) ]* (-2)

= - 1 / √(2 - x)

f(x) = √(1 - 2x)

f '(x) = 1/(2√(1 - 2x)) * -2 = -1/√(1 - 2x))

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