(R-5)²+100²=R²解的:

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/17 07:31:39

(R-5)²+100²=R²解的:
(R-5)²+100²=R²解的:

(R-5)²+100²=R²解的:
r^2 -10r + 25 +100^2 = r^2
10r = 25+100^2
r = 2.5+1000
r = 1002.5