11−cos2x\frac{1}{\sqrt{1-\cos^2x}}1−cos2x1
9x2−11=6x9x^2-11=6x9x2−11=6x
dydx=−xy4(y2+2)e−3x\frac{dy}{dx}=\frac{-xy^4}{\left(y^2+2\right)e^{-3x}}dxdy=(y2+2)e−3x−xy4
limx→3((ex3−e27)x−3)\lim_{x\to3}\left(\frac{\left(e^{x^3}-e^{27}\right)}{x-3}\right)x→3lim⎝⎛x−3(ex3−e27)⎠⎞
15⋅4+20⋅315\cdot4+20\cdot315⋅4+20⋅3
(−2−6)(−5)\left(-2-6\right)\left(-5\right)(−2−6)(−5)
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