学帮网计算：x³/(x+1)-x²+x-1（x+1）分之x的立方 减x的平方 加x 减1
来源：学生作业学帮网 编辑：学帮网 时间：2024/06/06 15:17:38
计算：x³/(x+1)-x²+x-1
（x+1）分之x的立方 减x的平方 加x 减1
原式=x³/(x+1)-(x²-x+1)
=x³/(x+1)-(x+1)(x²-x+1)/(x+1)
=[x³-(x+1)(x²-x+1)]/(x+1)
=[x³-(x³+1)]/(x+1)
=-1/(x+1)
x等于二分之一
原式=x³/(x+1)-(x²-x+1)
=x³/(x+1)-(x+1)(x²-x+1)/(x+1)
=[x³-(x+1)(x²-x+1)]/(x+1)
=[x³-(x³+1)]/(x+1)
=-1/(x+1)