设：2^x=3^y=5^z=a>1哪么：x=log2(a),y=log3(a),z=log5(a)2x=2log2(a)=1/(1/2)log2(a)=log(根号2)(a）=lg(a)/lg(根号2）同理,3y=log(三次根号3)(a)=lg(a)/lg(三次根号3)5z=log(五次根号5)(a)=lg(a)/lg(五次根号5)而...