2. 考研
  3. 若du(x，y)=[axy3+cos(x+2y)]dx+[3x2y2+bcos(x+2y)]dy，则a=________，b=________．

若du(x，y)=[axy3+cos(x+2y)]dx+[3x2y2+bcos(x+2y)]dy，则a=________，b=________．

admin2022-07-21  31
问题 若du(x，y)=[axy3+cos(x+2y)]dx+[3x2y2+bcos(x+2y)]dy，则a=________，b=________．
选项
答案2，2
解析
    3axy2-2sin(x+2y)=6xy2-bsin(x+2y)
    比较系数得a=2，b=2．
转载请注明原文地址:https://kaotiyun.com/show/VCR4777K
0

考研数学三

相关试题推荐
随机试题
最新回复(0)