gaokao 2022 Q12

gaokao · China · national-A-arts 5 marks Exponential Functions Ordering and Comparing Exponential Values

Given $9 ^ { m } = 10 , a = 10 ^ { m } - 11 , b = 8 ^ { m } - 9$ , then
A. $a > 0 > b$
B. $a > b > 0$
C. $b > a > 0$
D. $b > 0 > a$

Given $9 ^ { m } = 10 , a = 10 ^ { m } - 11 , b = 8 ^ { m } - 9$ , then\\
A. $a > 0 > b$\\
B. $a > b > 0$\\
C. $b > a > 0$\\
D. $b > 0 > a$