作业帮a∆b=3a-2b,x※y=[x+y] 除以0.5求[3.2∆1.8]※[2.8∆1.7]
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/09 05:56:53
![a∆b=3a-2b,x※y=[x+y] 除以0.5求[3.2∆1.8]※[2.8∆1.7]](/uploads/image/z/12581150-14-0.jpg?t=a%26%238710%3Bb%3D3a-2b%2Cx%E2%80%BBy%3D%5Bx%2By%5D+%E9%99%A4%E4%BB%A50.5%E6%B1%82%5B3.2%26%238710%3B1.8%5D%E2%80%BB%5B2.8%26%238710%3B1.7%5D)
a∆b=3a-2b,x※y=[x+y] 除以0.5求[3.2∆1.8]※[2.8∆1.7]
a∆b=3a-2b,x※y=[x+y] 除以0.5求[3.2∆1.8]※[2.8∆1.7]
a∆b=3a-2b,x※y=[x+y] 除以0.5求[3.2∆1.8]※[2.8∆1.7]
3.2∆1.8=3×3.2-2×1.8=2.8
2.8∆1.7=3×2.8-2×1.7=5
所以原式=(2.8+5)÷0.5=15.6