1.(-y)^2×y^n-1 2.(4a^3b-6a^b^2+12ab^3)÷(2ab)
问题描述:
1.(-y)^2×y^n-1 2.(4a^3b-6a^b^2+12ab^3)÷(2ab)
Thank
答
1.(-y)^2×y^n-1
=y^2×y^(n-1)
=y^(2+n-1)
=y^(n+1)
2.(4a^3b-6a^b^2+12ab^3)÷(2ab)
=4a^3b÷(2ab)-6a^2b^2÷(2ab)+12ab^3÷(2ab)
=2a^2-3ab+6b^2