因为f(x+1) = -f(x),所以
a = f(6/5) = -f(1/5) = -lg(1/5) = lg5
b = f(3/2) = -f(1/2) = -lg(1/2) = lg2
c = f(5/2) = -f(3/2) = f(1/2) = lg(1/2) = -lg2
显然lg5>lg2>-lg2,即a>b>c
因为f(x+1) = -f(x),所以
a = f(6/5) = -f(1/5) = -lg(1/5) = lg5
b = f(3/2) = -f(1/2) = -lg(1/2) = lg2
c = f(5/2) = -f(3/2) = f(1/2) = lg(1/2) = -lg2
显然lg5>lg2>-lg2,即a>b>c