当B/A=6时,求代数式B/2A+12A/B-3的值
问题描述:
当B/A=6时,求代数式B/2A+12A/B-3的值
答
正确的是:
B/A=6,则:A/B=1/6,有:
B/2A+12A/B-3
=1/2×B/A+12×A/B-3
=1/2×6+12×1/6-3
=3+2-3
=2