\(\frac{2x4+2x4x8+4x8x16+8x16x32}{3x4+2x6x8+4x12x16+8x24x32}\)
MÌNH ĐANG RẤT GẤP!!!
2x4+2x4x8+4x8x16+8x16x32/3x4+2x6x8+4x12x16+8x24x32=?
\(\frac{2x4+2x4x8+4x8x16+8x16x32}{3x4+2x6x8+4x12x16+8x24x32}\).Tìm giá trị của phân số
2x4+2x4x8+4x8x16+8x16x32
3x4+2x6x8+4x12x16+8x24x32
Tính nhanh tổng trên.
\(\frac{2x4+2x4x8+4x8x16+8x16x32}{3x4+2x6x8+4x12x16+8x24x32}\) Giúp mk với mk cần gấp . Cảm ơn trước🤝
2x4+2x4x8+4x8x16+8x16x24+16x24x32/3x4+2x4x6+3x4x12+4x12x16+12x16x32
1x2x4+2x4x8+3x6x12 / 1x3x4+2x6x8+3x9x12
Tính nhanh:
1x2x3 + 2x4x6 + 4x8x12 + 5x10x15 / 1x3x4 + 2x6x8 + 4x12x16 + 5x15x20
GIẢI CHI TIẾT RA GIÚP Ạ CHỨ 3H30 MÌNH ĐI HỌC RỒI,CẢM ƠN !!!
\(=\dfrac{1\cdot2\cdot3+8\cdot1\cdot2\cdot3+64\cdot1\cdot2\cdot3+125\cdot1\cdot2\cdot3}{1\cdot3\cdot4+8\cdot1\cdot3\cdot4+64\cdot1\cdot3\cdot4+125\cdot1\cdot3\cdot4}\)
\(=\dfrac{1\cdot2\cdot3}{1\cdot3\cdot4}=\dfrac{2}{4}=\dfrac{1}{2}\)
\(S=\frac{1}{1x3}-\frac{1}{2x4}+\frac{1}{3x5}-\frac{1}{4x6}+\frac{1}{5x7}-\frac{1}{6x8}+\frac{1}{7x9}-\frac{1}{8x10}\)
giúp mình với mình đang cần gấp.
\(S=\frac{1}{1.3}-\frac{1}{2.4}+\frac{1}{3.5}-\frac{1}{4.6}+\frac{1}{5.7}-\frac{1}{6.8}+\frac{1}{7.9}-\frac{1}{8.10}\)
\(\Rightarrow S=\frac{1}{2}\left(1-\frac{1}{3}-\frac{1}{2}+\frac{1}{4}+\frac{1}{3}-\frac{1}{5}-\frac{1}{4}+\frac{1}{6}+\frac{1}{5}-\frac{1}{7}-\frac{1}{6}+\frac{1}{8}+\frac{1}{7}-\frac{1}{9}-\frac{1}{8}+\frac{1}{10}\right)\)
\(\Rightarrow S=\frac{1}{2}\left(1+\frac{1}{10}\right)\)
\(\Rightarrow S=\frac{1}{2}.\frac{11}{10}\)
\(\Rightarrow S=\frac{11}{20}\)