你能帮帮他们吗
已知函数f(x)=x 4 -4x 3 +ax 2 -1在区间[0,1]上单调递增,在区间[1,2]上单调递减.
1年前
He lives in a small house, which I think ________. A.furnish
1年前
设f(x)在(0,∞)连续,对任意x,y∈(0,∞),都有∫(xy,1)f(X)dx=y∫(x,1)f(X)dx+x∫(
1年前
How old is the little girl?I think she may _____(be) eleven
1年前
如图所示,在烧杯中装入50mL浓度为0.01mol•L-1的Ba(OH)2溶液,连接好导线,将开关闭合,然后向Ba(OH
1年前