分解因式3x的n加1次方减6x的n次方加3x的n加1次方?
分解因式3x的n加1次方减6x的n次方加3x的n加1次方
3x的n+1次方-6x的n次方-9x的n-1次方 =3x的(n-1)次方(x²-2x-3) =3x的(n-1)次方(x-3)(x+1)
3x^(n+1)-6x^n+3x^(n-1)=3*[x^(n-1)]*(x^2-2x+1) =3*[x^(n-1)]*[(x-1)^2]
3x^(n+1)-6x^n+3x^(n+1) =6x^(n+1)-6x^n =6x^n*(x-1).
答:3X的n次方x(X-2+1/X)详情>>
答:详情>>