關於My3的百科

• My3-year-oldsonandIlivedaveryhardlifebecauseIhadbeenout...

• 問題詳情：My3-year-oldsonandIlivedaveryhardlifebecauseIhadbeenoutofworksincetwoyearsago.Beingpoorisaterriblefeelingwhenmy3-year-oldsonfinisheshismealandsays,“CanIhavesomemorebreadandjamplease,Mummy?”AndIbreakdownintears,becauseIdon’tknowhowtotellhim...
• 2020-02-1132796

• 要是關於x、y的多項式my3+3nx2y+2y3﹣x2y+y不含三次項，求2m+3n的值．

• 問題詳情：要是關於x、y的多項式my3+3nx2y+2y3﹣x2y+y不含三次項，求2m+3n的值．【回答】考點：多項式．分析：先合併同類項，根據已知得出m+2=0，3n﹣1=0，求出m、n的值後代入進行計算即可．解答：解：my3+3nx2y+2y3﹣x2y+y=（m+2）y3+（3n﹣1）x2y+y，∵關於x、y的多項式my3+3nx2y+2y3﹣x2y+y不含三次項，∴m+2=0，3n﹣1=0...
• 2019-05-1027533