设f(x),g(x)在[a,b]上连续且g(x)A.B.C.D.
举一反三
- 设f(x),g(x)在[a,b]上连续,且f(x)+g(x)≠0,若,则______。
- 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。
- 设函数f(X),g(X)在[a,b]上连续,在(a,b)内可导,且在(a,b)上f′(x)≦g′(x),则有f(b)-f(a)≦g(b)-g(a)
- 设函数f(x),g(x)在[a,b]上连续,在(a,b)内可导,且g’(x)≠0,