y=(1/2)的(x的平方-2x+3)次幂
=(1/2)^[(x-1)^2+2]
=2^[-(x-1)^2-2]
当x=1时,-(x-1)^2-2有最大值-2,y=2^-2=1/4
当x为正负无穷时,-(x-1)^2-2为负无穷,y趋向于0
函数值域为(0,1/4]
y=(1/2)的(x的平方-2x+3)次幂
=(1/2)^[(x-1)^2+2]
=2^[-(x-1)^2-2]
当x=1时,-(x-1)^2-2有最大值-2,y=2^-2=1/4
当x为正负无穷时,-(x-1)^2-2为负无穷,y趋向于0
函数值域为(0,1/4]