来自马金猛的问题
解不等式(2017:31:33)∣x-x2-2∣>x2-3x-4
解不等式(2017:31:33)
∣x-x2-2∣>x2-3x-4
1回答
2020-04-16 21:00
解不等式(2017:31:33)∣x-x2-2∣>x2-3x-4
解不等式(2017:31:33)
∣x-x2-2∣>x2-3x-4
∣x-x2-2∣>x2-3x-4
x-x2-2>x2-3x-4x-x2-2x2+x2+2-4x-3x2x2-2-2x(x2-1)/2x>3
当(x2-1)/2>=3时则x>3
当(x2-1)/2(x2-1)/2