ab=[2(1-lg2)]/3lg2怎么化简成lg2=2/(3ab+2)
问题描述:
ab=[2(1-lg2)]/3lg2怎么化简成lg2=2/(3ab+2)
答
原式化为:3ablg2=2-2lg2
两边加2lg2:3ablg2+2lg2=2
即:(3ab+2)lg2=2
得:lg2=2/(3ab+2)