prep pack2一道数学题求问

neinei11

How much more interest will Maria receive if she invests $1,000 for one year at x percent annual interest, compounded semiannually, than if she invests $1,000 for one year at x percent annual interest, compounded annually?

a. 5x
b. 10x
c. x^2/20
d. x^2/40
e. 10x+(x^2/10)

答案是d. 求解释

honda566

1000(1+X/200)平方- 1000（1+x/100) =

neinei11

honda566 发表于 2017-10-20 20:26
1000(1+X/200)平方- 1000（1+x/100) =

感谢，忘记x是百分数要除以100了..