19 câu Dạng 1: Tính vi phân

$dy=\frac{1}{2\sqrt{x^2-5x}}dx$

$dy=\frac{2x-5}{\sqrt{x^2-5x}}dx$.

$dy=-\frac{2x-5}{2\sqrt{x^2-5x}}dx$.

$dy=\frac{2x-5}{2\sqrt{x^2-5x}}dx$.

$dy=\left(2\sin x+x\cos x\right)dx$ .

$dy=x\cos xdx$

$dy=x\cos x$

$dy=\left(\sin x+\cos x\right)dx$

1,2608.

1,2611.

1,3391

1,3392.

$\frac{d\left(\sin x\right)}{d\left(\cos x\right)}=-\cot x$.

$\frac{d\left(\sin x\right)}{d\left(\cos x\right)}=-\tan x$.

$\frac{d\left(\sin x\right)}{d\left(\cos x\right)}=\cot x$.

$\frac{d\left(\sin x\right)}{d\left(\cos x\right)}=\tan x$ .

$dy=2\left(x-1\right)dx$ .

$dy={\left(x-1\right)}^{2}dx$.

$dy=2\left(x-1\right)$.

$dy=\left(x-1\right)dx$.

$dy=2\left(x-1\right)dx$.

$dy={\left(x-1\right)}^{2}dx$.

$dy=2\left(x-1\right)$.

$dy=\left(x-1\right)dx$ .

$dy=\frac{1}{\sqrt{1+x^2}}dx$.

$dy=\frac{x}{\sqrt{1+x^2}}dx$.

$dy=\frac{2x}{\sqrt{1+x^2}}dx$

$dy=\frac{1+x^2}{\sqrt{1+x^2}}dx$

$dy=\frac{3}{\sqrt{3x+2}}dx$ .

$dy=\frac{1}{2\sqrt{3x+2}}dx$.

$dy=\frac{1}{\sqrt{3x+2}}dx$ .

$dy=\frac{3}{2\sqrt{3x+2}}dx$.

$dy=-\frac{8}{{\left(2x-1\right)}^2}dx$ .

$dy=\frac{4}{{\left(2x-1\right)}^2}dx$.

$dy=-\frac{4}{{\left(2x-1\right)}^2}dx$.

$dy=-\frac{7}{{\left(2x-1\right)}^2}dx$ .

$dy=\left(x\cos x-\sin x\right)dx$.

$dy=\left(x\cos x\right)dx$ .

$dy=\left(\cos x-\sin x\right)dx$.

$dy=\left(x\sin x\right)dx$.

$df\left(x\right)=\frac{-\sin 4x}{2\sqrt{1+{\cos }^{2}2x}}dx$.

$df\left(x\right)=\frac{-\sin 4x}{\sqrt{1+{\cos }^{2}2x}}dx$ .

$df\left(x\right)=\frac{\cos 2x}{\sqrt{1+{\cos }^{2}2x}}dx$.

$df\left(x\right)=\frac{-\sin 2x}{\sqrt{1+{\cos }^{2}2x}}dx$.

$dy=\frac{2\sqrt{x}}{4x\sqrt{x}{\cos }^2\sqrt{x}}dx$.

$dy=\frac{\sin \left(2\sqrt{x}\right)}{4x\sqrt{x}{\cos }^2\sqrt{x}}dx$ .

$dy=\frac{2\sqrt{x}-\sin \left(2\sqrt{x}\right)}{4x\sqrt{x}{\cos }^2\sqrt{x}}dx$.

$dy=\frac{2\sqrt{x}-\sin \left(2\sqrt{x}\right)}{4x\sqrt{x}{\cos }^2\sqrt{x}}dx$ .

$dy=\frac{1}{4}dx$.

$dy=\frac{1}{x^4}dx$ .

$dy=-\frac{1}{x^4}dx$ .

$dy=x^{4}dx$ .