不對
次數(shù)相減得
3m+2n-(m-n)=3m+2n-m+n=2m+3n
即
a^3m+2n÷a^m一n
=a^(3m+2n-m+n)
=a^(2m+3n)[(x+y)^2n]^4÷(一x一y)^2n+1[(x+y)^2n]^4÷(一x一y)^2n+1=(x+y)^8n÷[-(x+y)^2n+1]=-(x+y)^(8n-2n-1)=-(x+y)^(6n-1)9^8x27^2÷(一3)^18我在對題追問是要扣除你財富值的，而我回答追問得不到任何積分和采納，對你對我都不利。若還有其他問題，請采納本題后重新開網(wǎng)頁發(fā)題目然后點擊向我求助