1) 46×38=1748
2) 94×64=6016
3) 45×36=1620
5) 105×67=7035
9) 230×17=850
10) 430×31=2170
16) 92×536=49312
Ответ:
Пошаговое объяснение:
д) 1/2+1/4 приводим к общему знаменателю 2/4+1/4=3/4
е) 3/10+2/5=3/10+4/10=7/10
ж) 1/6+2/3=1/6+4/6=5/6
з) 3/5+1/20=12/20+1/20=13/20
![y'(x)=(ln(sin2x))'=\frac{(sin2x)'}{sin2x}=\frac{cos2x*(2x)'}{sin2x}=\frac{2cos2x}{sin2x}](https://tex.z-dn.net/?f=y%27%28x%29%3D%28ln%28sin2x%29%29%27%3D%5Cfrac%7B%28sin2x%29%27%7D%7Bsin2x%7D%3D%5Cfrac%7Bcos2x%2A%282x%29%27%7D%7Bsin2x%7D%3D%5Cfrac%7B2cos2x%7D%7Bsin2x%7D)
![y'(\frac{\pi}{8})=\frac{2cos\frac{2\pi}{8}}{sin\frac{2\pi}{8}}=\frac{2cos\frac{\pi}{4}}{sin\frac{\pi}{4}}=\frac{2*\frac{\sqrt{2}}{2}}{\frac{\sqrt{2}}{2}}=2](https://tex.z-dn.net/?f=y%27%28%5Cfrac%7B%5Cpi%7D%7B8%7D%29%3D%5Cfrac%7B2cos%5Cfrac%7B2%5Cpi%7D%7B8%7D%7D%7Bsin%5Cfrac%7B2%5Cpi%7D%7B8%7D%7D%3D%5Cfrac%7B2cos%5Cfrac%7B%5Cpi%7D%7B4%7D%7D%7Bsin%5Cfrac%7B%5Cpi%7D%7B4%7D%7D%3D%5Cfrac%7B2%2A%5Cfrac%7B%5Csqrt%7B2%7D%7D%7B2%7D%7D%7B%5Cfrac%7B%5Csqrt%7B2%7D%7D%7B2%7D%7D%3D2)
dx - дельта х, тоесть приращение функции.
Следовательно дифференциал равен:
![df=y'(x)*dx=2*0.01=0.02](https://tex.z-dn.net/?f=df%3Dy%27%28x%29%2Adx%3D2%2A0.01%3D0.02)
Вродебы так-_-