3.14xX²+3.14x(X÷2)²=100
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 06:38:43
![3.14xX²+3.14x(X÷2)²=100](/uploads/image/z/312449-41-9.jpg?t=3.14xX%26%23178%3B%2B3.14x%EF%BC%88X%C3%B72%EF%BC%89%26%23178%3B%3D100)
3.14xX²+3.14x(X÷2)²=100
3.14xX²+3.14x(X÷2)²=100
3.14xX²+3.14x(X÷2)²=100
3.14xX²+3.14x(X÷2)²=100
这道题,想求的不是x=多少,而是想求大圆面积或者小圆面积是多少吧?
3.14xX²+3.14x(X÷2)²=100
3.14xX²+3.14xX²÷4=100
(1+1/4)3.14xX²=100
3.14xX²=80
大圆面积:80
小圆面积:20
3.14xX²+3.14x(X÷2)²=100
3.14×5/4x²=100
x²=80/3.14
x=±5.0475