题目可能是错题,或发烧题;
如:
一.
f(x)=x^2+(1/2) x∈[-√2.5,√2.5]
f(-x)=x^2+(1/2)
F(x)=2x^2+1
值域为:[1,6]
二
f(x)=(5x+7)/4 x∈[-1 ,1]
f(-x)=(-5x+7)/4 x∈[-1 ,1]
F(X)=7/2 x∈[-1 ,1]
值域为:{7/2}
题目可能是错题,或发烧题;
如:
一.
f(x)=x^2+(1/2) x∈[-√2.5,√2.5]
f(-x)=x^2+(1/2)
F(x)=2x^2+1
值域为:[1,6]
二
f(x)=(5x+7)/4 x∈[-1 ,1]
f(-x)=(-5x+7)/4 x∈[-1 ,1]
F(X)=7/2 x∈[-1 ,1]
值域为:{7/2}