已知a/2=b/3不等于0,求代数5a-2b/a2-4b2*的值
2015-10-14
展开全部
设a/2=b/3=k,则a=,b=3k(k≠0)
(5a-2b)/(a²-4b²)×(a-2b)
=(5a-2b)(a-2b)/(a+2b)(a-2b)
=(5a-2b)/(a+2b)
=(10k-6k)/(+6k)
=4k/8k
=1/2
(5a-2b)/(a²-4b²)×(a-2b)
=(5a-2b)(a-2b)/(a+2b)(a-2b)
=(5a-2b)/(a+2b)
=(10k-6k)/(+6k)
=4k/8k
=1/2
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询