The new tax policy requires anyone selling a secondhand apartment or house within five years of its purchase to pay a sales tax of 5.5 percent, extending the taxable period from the previous two years to five years.
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【简答题】已知函数f(x)= 1 3 a x 3 - 1 4 x 2 +cx+d(a,c,d∈R)满足f(0)=0,f'(1)=0,且f'(x)≥0在R上恒成立. (1)求a,c,d的值; (2)若 h(x)= 3 4 x 2 -bx+ b 2 - 1 4 ,解不等式f'(x)+h(x)<0; (3)是否存在实数m,使函数g(x)=f'(x)-mx在区间[m,m+2]上有最小值-5?若存在,请求出实数m的值...