问题
填空题
已知a=log0.20.3,b=log1.20.8,c=1.50.5,则将a,b,c按从小到大的顺序排列为______.
答案
∵0<a=log0.20.3<log0.20.2=1,
b=log1.20.8,<log1.21=0,
c=1.50.5>1.50=1,
∴b<a<c.
故答案为:b<a<c.
已知a=log0.20.3,b=log1.20.8,c=1.50.5,则将a,b,c按从小到大的顺序排列为______.
∵0<a=log0.20.3<log0.20.2=1,
b=log1.20.8,<log1.21=0,
c=1.50.5>1.50=1,
∴b<a<c.
故答案为:b<a<c.