f(-x) = a^|-x-b|=f(x)=a^|x-b|
得-x-b = 正负(x-b)对任意x成立.得b = 0
f(x) = a^|x|
4 = a^|2|,得 a = 2
f(2) = a^2
log以a为底2+1>0
f(log以a为底2+1)= 2 + a
令 y = f(2) - 2 - a = a^2 -2 - a
当 a1,y大于零,即f(2)>f(log以a为底2+1)
当 -2
f(-x) = a^|-x-b|=f(x)=a^|x-b|
得-x-b = 正负(x-b)对任意x成立.得b = 0
f(x) = a^|x|
4 = a^|2|,得 a = 2
f(2) = a^2
log以a为底2+1>0
f(log以a为底2+1)= 2 + a
令 y = f(2) - 2 - a = a^2 -2 - a
当 a1,y大于零,即f(2)>f(log以a为底2+1)
当 -2