4/5 x4+2/5x2+1/5x16 简便计算
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4/5 x4+2/5x2+1/5x16 简便计算
4/5 x4+2/5x2+1/5x16 简便计算
4/5 x4+2/5x2+1/5x16 简便计算
4/5 x4+2/5x2+1/5x16
=16*1/5+4*1/5+16*1/5
=1/5(16+4+16)
=1/5*36
=36/5
=7.2
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4/5x4+2/5x2+1/5x16
4/5 x4+2/5x2+1/5x16 简便计算
六年级4/5x4+2/5x2+5/1x16怎么算啊?
1x2+2x3+3x4+4x5+.+15x16
1x2+2x3+3x4+4x5...+15x16,结果是奇数还是偶数?
请你认真观察下面各个式子,然后根据你发现的规律写出第4,5个式子√16=√1x16=√1x4²=√1x√4²=1x4=42.√32=√2x16=√2x4²=√2x√4²=√2x4=4√23.√48=√3x16=√3x4²=√3x√4²=√3x4=4√3
请你认真观察下面各个式子,然后根据你发现的规律写出第4,5个式子1.√16=√1x16=√1x4²=√1x√4²=1x4=42.√32=√2x16=√2x4²=√2x√4²=√2x4=4√23.√48=√3x16=√3x4²=√3x√4²=√3x4=4
确定a的值,使线性方程组{X1+X2+X3+X4=1,3X1+2X2+X5+X4=0,X2+2X3+2X4=a,5X1+4X2+3X2+3X4=2 并求通解
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用初等行变换来解下列线性方程组(1)2x1-x2+3x3=3 3x1+x2-5x3=0 4x1-x2+x3=3 x1+3x2-13x3=-6(2) x1-2x2+x3+x4=1 x1-2x2+x3-x4=-1 x1-2x2+x3-5x4=5(3) x1-x2+x3-x4=1 x1-x2-x3+x4=0 x1-x2-2x3+2x4=-1/2
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