\(\frac{-360}{450}\);\(\frac{2.3.5.13}{26.35}\)
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\(\frac{2019}{210}+\frac{2019}{280}+\frac{2019}{360}+\frac{2019}{450}+\frac{2019}{550}\)
\(=\frac{673}{70}+\frac{2019}{280}+\frac{673}{120}+\frac{673}{150}+\frac{2019}{550}\)
\(=\left[\frac{673}{70}+\frac{2019}{280}\right]+\frac{673}{120}+\frac{673}{150}+\frac{2019}{550}\)
\(=\left[\frac{2692}{280}+\frac{2019}{280}\right]+\frac{673}{120}+\frac{673}{150}+\frac{2019}{550}\)
\(=\frac{673}{40}+\frac{673}{120}+\frac{673}{150}+\frac{2019}{550}\)
\(=\left[\frac{673}{40}+\frac{673}{120}\right]+\frac{673}{150}+\frac{2019}{550}\)
\(=\left[\frac{2019}{120}+\frac{673}{120}\right]+\frac{673}{150}+\frac{2019}{550}\)
\(=\frac{673}{30}+\frac{673}{150}+\frac{2019}{550}\)
\(=\left[\frac{673}{30}+\frac{673}{150}\right]+\frac{2019}{550}\)
\(=\frac{673}{25}+\frac{2019}{550}=\frac{14806}{550}+\frac{2019}{550}=\frac{16825}{550}=\frac{673}{22}\)
P/S : Các a chị check dùm em ạ
a) Ta có:
\(\begin{array}{l}{360^ \circ } = 360.\frac{\pi }{{180}} = 2\pi \\ - {450^ \circ } = 450.\frac{\pi }{{180}} = \frac{5}{2}\pi \end{array}\)
b)\(3\pi = 3\pi .{\left( {\frac{{180}}{\pi }} \right)^ \circ } = {540^ \circ }\)
\( - \frac{{11\pi }}{5} = \left( { - \frac{{11\pi }}{5}} \right).{\left( {\frac{{180}}{\pi }} \right)^ \circ } = - {396^ \circ }\)
A = \(\frac{1}{10}\)+ \(\frac{1}{30}\)+\(\frac{1}{60}\)+.....+\(\frac{1}{360}\)+ \(\frac{1}{450}\)=?
A = 450 + 550 = 1000.
B = 360 + 640 = 1000.
A + B = 1000 + 1000 = 2000.
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Ai tk cho mình mình tk lại.
A= 1000
B=1000
A+B=2000
Ai k mình mình k lại hứa yên tâm!
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