Question

若單項(xiàng)式3x³y^m與-2xⁿy是同類項(xiàng)，則m+n=

4

．

Answer 1

分析：根據(jù)同類項(xiàng)得定義得出n=3，m=1，代入求出即可．

解答：解：∵單項(xiàng)式3x³y^m與-2xⁿy是同類項(xiàng)，
∴n=3，m=1，
∴m+n=1+3=4，
故答案為：4．

點(diǎn)評(píng)：本題考查了同類項(xiàng)得應(yīng)用，注意：所含字母相同，并且相同字母的指數(shù)也分別相等的項(xiàng)叫同類項(xiàng)．