有一组单项式:-x,2x^2,-3x^3,-4x^4,...-19x^19,20x^20,...
有一组单项式:-x,2x^2,-3x^3,-4x^4,...-19x^19,20x^20,...
.有一组单项式:-x,2x^2,-3x^3,4x^4,...-19x^19,20x^20,...(1)你能说出它们的规律
有一组单项式:x,-2x^2,3x^3,-4x^4,...,-10x^10,...
一列单项式:-x,2x^2,-3x^3,4x^4,...,-19x^19,20x^20,...
观察下列单项式:-x ,2x^2 ,-3x^3 ,4x ,.-19x^19 ,20x^20.
有一串单项式:-X,2X^2,-3X^3,4X^4,...,-19X^19,20X^20,...请写出第N个,第(N+1
有一列单项式-X,2x的平方,-3x的3次方,4x的4次方,...,-19x的19次方,20x的20次方,...
有一串单项式:-X,2X的平方,-3X的立方,4X的4次方,...,19X的19次方,20X的20次方
有一列单项式,:-x,2x,-3x,4x,-5x,6x,-7x.求排列规律
有一列单项式,:-x,2x,-3x,4x,-5x,6x,-7x.求排列规律?
有一串单项式 急啊.有一串单项式,-x,2x的二次方,-3x的三次方,4x的四次方.-19x的十九次方,20x的二十次方
找规律,-x,2x^2,-3x^3,4x^4…,-19x^19,20x^20…请根据规律写出第n个单项式