judy is 10 and her sister is 12 .in how many years will their ages total 38
题目
judy is 10 and her sister is 12 .in how many years will their ages total 38
答案
judy 10岁
她姐姐 12岁
几年后他们的年龄和为 38
(38-10-12)/2 = 8
8年后
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
最新试题
热门考点