A) She received a bonus unexpectedly. B) She got a well-paying job in a bank. C She received her first monthly salary. D) She got a pay raise for her performance.
【简答题】已知函数f(x)= x 3 + x 2 -ax-a,x∈R,其中a>0。 (1)求函数f(x)的单调区间; (2)若函数f(x)在区间(-2,0)内恰有两个零点,求a的取值范围; (3)当a=1时,设函数f(x)在区间[t,t+3]上的最大值为M(t),最小值为m(t),记g(t)=M(t)-m(t),求函数g(t)在区间[-3,-1]上的最小值。