设f(x)、g(x)在区间[a,b]上均连续,证明:(1)、;(2)、
举一反三
- 设f(X)及g(X)在[a,b]上连续(a<b),证明:(1)若在[a,b]上f(x)>=0,且∫f(x)dx=0,则在[a,b]上f(x)恒等于0(2)若在[a,b]上f(x)>=g(x),且∫f(x)dx=∫g(x)dx,则在[a,b]上f(x)恒等于g(x)
- 设f(x)及g(x)在[a,b]上连续,证明:若在[a,b]上,f(x)≥0,且。
- 高数:若f(x),g(x)在[a,b]区间连续,F(x)=[a,x定积分区间]g(x)d(x)*[b,x定积分区间]f(x)d(x).
- 设f(x)在[a,b]上连续,且f(x)不恒等于零,证明∫(a,b)[f(x)]²dx>0
- 设f(x),g(x)在[a,b]上二阶可导,g""(x)≠0,f(a)=f(b)=g(a)=g(b)=0.证明:设f(x),g(x)在[a,b]上二阶可导,g""(x)≠0,f(a)=f(b)=g(a)=g(b)=0.证明: