求值.1/2a-2(a-1/3b²)+(-3/2a+1/3b²),其中a=-2,b=2/3(3a²+2a-b)-(a²+2a+b),其中a=4,b=-2计算.(1)x是绝对值等于2的负数,y的倒数是-1/3,z是相反数等于本身的数,求代数式3x²y-[ x²y-(2xyz-x²
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![求值.1/2a-2(a-1/3b²)+(-3/2a+1/3b²),其中a=-2,b=2/3(3a²+2a-b)-(a²+2a+b),其中a=4,b=-2计算.(1)x是绝对值等于2的负数,y的倒数是-1/3,z是相反数等于本身的数,求代数式3x²y-[ x²y-(2xyz-x²](/uploads/image/z/3770742-30-2.jpg?t=%E6%B1%82%E5%80%BC.1%2F2a-2%28a-1%2F3b%26%23178%3B%29%2B%28-3%2F2a%2B1%2F3b%26%23178%3B%29%2C%E5%85%B6%E4%B8%ADa%3D-2%2Cb%3D2%2F3%EF%BC%883a%26%23178%3B%2B2a-b%29-%28a%26%23178%3B%2B2a%2Bb%29%2C%E5%85%B6%E4%B8%ADa%3D4%2Cb%3D-2%E8%AE%A1%E7%AE%97.%EF%BC%881%EF%BC%89x%E6%98%AF%E7%BB%9D%E5%AF%B9%E5%80%BC%E7%AD%89%E4%BA%8E2%E7%9A%84%E8%B4%9F%E6%95%B0%2Cy%E7%9A%84%E5%80%92%E6%95%B0%E6%98%AF-1%2F3%2Cz%E6%98%AF%E7%9B%B8%E5%8F%8D%E6%95%B0%E7%AD%89%E4%BA%8E%E6%9C%AC%E8%BA%AB%E7%9A%84%E6%95%B0%2C%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F3x%26%23178%3By-%5B+x%26%23178%3By-%282xyz-x%26%23178%3B)
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求值.1/2a-2(a-1/3b²)+(-3/2a+1/3b²),其中a=-2,b=2/3(3a²+2a-b)-(a²+2a+b),其中a=4,b=-2计算.(1)x是绝对值等于2的负数,y的倒数是-1/3,z是相反数等于本身的数,求代数式3x²y-[ x²y-(2xyz-x²
求值.
1/2a-2(a-1/3b²)+(-3/2a+1/3b²),其中a=-2,b=2/3
(3a²+2a-b)-(a²+2a+b),其中a=4,b=-2
计算.
(1)x是绝对值等于2的负数,y的倒数是-1/3,z是相反数等于本身的数,求代数式3x²y-[ x²y-(2xyz-x²z)-4x²z ]-xyz的值
(2)若(1)中的z是最小的正整数时,其他条件不变,则原式的值是多少?
急就急就急
急就急就急
急就急就急
求值.1/2a-2(a-1/3b²)+(-3/2a+1/3b²),其中a=-2,b=2/3(3a²+2a-b)-(a²+2a+b),其中a=4,b=-2计算.(1)x是绝对值等于2的负数,y的倒数是-1/3,z是相反数等于本身的数,求代数式3x²y-[ x²y-(2xyz-x²
求值:124/27
36
计算:(1)X=-2,y=-3,z=0 结果=-24
(2)X=-2,y=-3,z=1 结果=-6
坑爹啊,想累死我们吗,虽然不难,也够折腾人了。
LZ读几年级啊,不自己做不行啊!太懒了
呃
有些麻烦了