作业帮先化简再求值:-1/2a^2b-[3\2a^2b-3(abc-1\3a^2c)-4a^2c]-3abc,其中a=-1,b=-3c=1
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/16 16:23:46
![先化简再求值:-1/2a^2b-[3\2a^2b-3(abc-1\3a^2c)-4a^2c]-3abc,其中a=-1,b=-3c=1](/uploads/image/z/584435-11-5.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%E5%86%8D%E6%B1%82%E5%80%BC%3A-1%2F2a%5E2b-%5B3%5C2a%5E2b-3%28abc-1%5C3a%5E2c%29-4a%5E2c%5D-3abc%2C%E5%85%B6%E4%B8%ADa%3D-1%2Cb%3D-3c%3D1)
先化简再求值:-1/2a^2b-[3\2a^2b-3(abc-1\3a^2c)-4a^2c]-3abc,其中a=-1,b=-3c=1
先化简再求值:-1/2a^2b-[3\2a^2b-3(abc-1\3a^2c)-4a^2c]-3abc,其中a=-1,b=-3c=1
先化简再求值:-1/2a^2b-[3\2a^2b-3(abc-1\3a^2c)-4a^2c]-3abc,其中a=-1,b=-3c=1
-1/2a^2b-[3\2a^2b-3(abc-1\3a^2c)-4a^2c]-3abc
=-1/2a^2b-3\2a^2b+3abc-a^2c+4a^2c-3abc
=-2a^2b+3a^2c
=-2×1×1+3×1×（-1/3）
=-2-1
=-3