Câu hỏi của YẾN NHI

Question

5x230x318-4x320x2275x29x219x319-7x229x318đây là phân số đấy nha

Ngo Tung Lam · Accepted Answer

$\frac{5.2^{30}.3^{18}-4.3^{20}.2^{27}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}$$=\frac{5.2^{28}.2^2.3^{18}-4.3^{18}.3^2.2^{27}}{5.2^{28}.3^{18}.3-7.2^{27}.2^2.3^{18}}$$=\frac{3^{18}.\left(5.2^{28}.4-4.9.2^{27}\right)}{3^{18}.\left(5.3.2^{28}-7.2^{27}.4\right)}$$=\frac{20.2^{28}-9.2.2.2^{27}}{15.2^{28}-14.2.2^{27}}$$=\frac{2^{28}.20-18.2^{28}}{15.2^{28}-14.2^{28}}$$=\frac{2^{28}.\left(20-18\right)}{2^{28}.\left(15-14\right)}$$=\frac{2^{28}.2}{2^{28}1}$$=2$Câu trả lời:        $\frac{5.2^{30}.3^{18}-4.3^{20}.2^{27}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}$$=\frac{5.2^{28}.2^2.3^{18}-4.3^{18}.3^2.2^{27}}{5.2^{28}.3^{18}.3-7.2^{27}.2^2.3^{18}}$$=\frac{3^{18}.\left(5.2^{28}.4-4.9.2^{27}\right)}{3^{18}.\left(5.3.2^{28}-7.2^{27}.4\right)}$$=\frac{20.2^{28}-9.2.2.2^{27}}{15.2^{28}-14.2.2^{27}}$$=\frac{2^{28}.20-18.2^{28}}{15.2^{28}-14.2^{28}}$$=\frac{2^{28}.\left(20-18\right)}{2^{28}.\left(15-14\right)}$$=\frac{2^{28}.2}{2^{28}1}$$=2$

Đình Danh Nguyễn · Answer

=2/1 = 2Câu trả lời: =2/1 = 2

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n-1	1	-1	5	-5
n	2	0	6	-4

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