解方程 我主要是求:格式!if x∈{0,1,2,3,4,5,6,}1.x+6=102.13-x=73.x(8-x)=154.3x+5=26
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![解方程 我主要是求:格式!if x∈{0,1,2,3,4,5,6,}1.x+6=102.13-x=73.x(8-x)=154.3x+5=26](/uploads/image/z/556958-38-8.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B+%E6%88%91%E4%B8%BB%E8%A6%81%E6%98%AF%E6%B1%82%3A%E6%A0%BC%E5%BC%8F%21if+x%E2%88%88%7B0%2C1%2C2%2C3%2C4%2C5%2C6%2C%7D1.x%2B6%3D102.13-x%3D73.x%288-x%29%3D154.3x%2B5%3D26)
解方程 我主要是求:格式!if x∈{0,1,2,3,4,5,6,}1.x+6=102.13-x=73.x(8-x)=154.3x+5=26
解方程 我主要是求:格式!
if x∈{0,1,2,3,4,5,6,}
1.x+6=10
2.13-x=7
3.x(8-x)=15
4.3x+5=26
解方程 我主要是求:格式!if x∈{0,1,2,3,4,5,6,}1.x+6=102.13-x=73.x(8-x)=154.3x+5=26
“x∈{0,1,2,3,4,5,6,}”
x+6=10 13-x=7
x=10-6 x=13-7
x=4 x=6
x∈{0,1,2,3,4,5,6,} x∈{0,1,2,3,4,5,6,}
so方程解为x=4 so方程解为x=6
x(8-x)=15 3x+5=26
x^2-8x+15=0 3x=26-5
(x-3)(x-5)=0 3x=21
x=3 或 x=5 x=7
x∈{0,1,2,3,4,5,6,} x!∈{0,1,2,3,4,5,6,}
so方程解为x=3 或 x=5 so方程无解
晕啊,堂堂大学生解这种问题.