log3^(a+1)=2
所以 3^2=a+1
a=9-1=8
log2^a=log2^8=3当log3^4 *log4^5 *log5^m =2 ,则m为log3^4 *log4^5 *log5^m =log3^5*log5^m=log3^m=2所以 m=3^2=9