原装E6B2-CWZ5 1000PR编码器现货 Omron/欧姆龙 广泛 是 接触式 增量式 深圳市弘欣自动化科技有限公司 2年 查看详情 ¥1.01/个 广东深圳 EE-SX1109 微型光电开关 光电传感器 OMRON 批次23+ 表面贴装型 微型 深圳市班迪特电子科技有限公司 4年 查看详情 ¥148.00/件 重庆 CP1W-CN811欧姆龙CP1W-CN811电源...
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5、(5ax^2+15x)÷5x 6、(a+2b)(a-2b) 7、(3a+b)^2 8、(1/2 a-1/3 b)^2 9、(x+5y)(x-7y) 10、(2a+3b)(2a+3b) 11、(x+5)(x-7) 12、5x^3×8x^2 13、-3x×(2x^2-x+4) 14、11x^12×(-12x^11) 15、(x+5)(x+6) 16、(2x+1)(2x+3) 17、3x^3y×(2x^2y-3...
已知圆C:x2+y2-x-8y+m=0与直线x+2y-6=0相交于P、Q两点,定点R(1,1),若PR⊥QR,求m的值. 试题答案 在线课程 设P(x1,y1),Q(x2,y2),联立方程组可得 x2+y2-x-8y+m=0 x+2y-6=0 , 消y并整理可得x2+ 4 5 m-12=0, 由韦达定理可得x1+x2=0,x1x2= ...
¥[1_7ij1w4tp#51#NTU1NThmsmhvb0pvrG9KYxBhhmPXb1dof3urb0p63GP2YPRgOGVwZ/tjc2YHZPNi4VWGe4JVamg8bCx6zmLYYwloPGe2YuFkHWT2a6Jts2Yqe3BrYg==] 暖身贴(数量选5福利价)-G41-10.14 ¥[1_7ij1w4tp#51#ZGRkZGkx/j8gNSU4LDzyMVw+pwSiBGY62Q==] 24806-#100%绵羊毛填充男士背心-Q--9.21 ...
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