15 Did you copy the college entrance examination questions in Zhejiang wrong? The topic of the college entrance examination should be a=log_4(3)= 1/2log_2(3).

2 A = √ 2 (log _ 2 (3)) = √ 3 in 2 A+2 (-a), so 2 A+2 (-a) = 4 √ 3/3.