2a(1+x%)(1+x%)-a(1-x%)(1-x%)
=2a(1+x/50+x*x/10000)a(1-x/50+x*x/10000)
=2a+1/25ax+1/5000ax*x-a+1/50x-1/10000ax*x
=a+(3/50)ax+(1/10000)ax*x(亿元)
电脑上写不方便,你自己写平方就可以了
我的答案一定正确!
2a(1+x%)(1+x%)-a(1-x%)(1-x%)
=2a(1+x/50+x*x/10000)a(1-x/50+x*x/10000)
=2a+1/25ax+1/5000ax*x-a+1/50x-1/10000ax*x
=a+(3/50)ax+(1/10000)ax*x(亿元)
电脑上写不方便,你自己写平方就可以了
我的答案一定正确!