Cho \(y = - 6\sqrt x + \frac{3}{x}\). Tìm y'
A. \(y' = \frac{3}{{\sqrt x }}\)
B. \(y' = - \frac{3}{{\sqrt x }} - \frac{3}{{{x^2}}}\)
C. \(y' = \frac{3}{{\sqrt 3 }} - 5\)
D. \(y' = - \frac{3}{{\sqrt x }} + \frac{3}{x}\)
Ta có:
\(y' = \frac{{ - 6}}{{2\sqrt x }} - \frac{3}{{{x^2}}} = \frac{{ - 3}}{{\sqrt x }} - \frac{3}{{{x^2}}}\)
Chọn B.
-- Mod Toán 11
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