设√1-2f(x)=t,t²=1-2f(X),t²∈[1/9,1/4],t∈[1/3,1/2]∪[-1/2,-1/3]
f(x)=1/2-1/2*t²,所以g(t)=-1/2*t²+t+1/2
g(t)值域[-1/8,7/8]
你是求g(x)值域还是f(x)值域啊?
设√1-2f(x)=t,t²=1-2f(X),t²∈[1/9,1/4],t∈[1/3,1/2]∪[-1/2,-1/3]
f(x)=1/2-1/2*t²,所以g(t)=-1/2*t²+t+1/2
g(t)值域[-1/8,7/8]
你是求g(x)值域还是f(x)值域啊?