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[主观题]
设f(x)及g(x)在[a,b]上连续,证明(1)若在[a,b]上,f(x)≥0,且f(x)dx= 0,则在[a,b]上f(x)=0;(2)若
设f(x)及g(x)在[a,b]上连续,证明(1)若在[a,b]上,f(x)≥0,且f(x)dx= 0,则在[a,b]上f(x)=0;(2)若
设f(x)及g(x)在[a,b]上连续,证明
(1)若在[a,b]上,f(x)≥0,且f(x)dx= 0,则在[a,b]上f(x)=0;
(2)若在[a,b]上,f(x)≥0,且f(x)≠0,则f(x)dx>0;
(3)若在[a,b]上,f(x)≤g(x),且f(x)dx=
g(x)dx, 则在[a,b]上f(x)=g(x).
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