A QUESTION ABOUT MATHS 有一直立标杆,它的上部被风从B处吹折,杆顶C着地,离杆脚2米.修好后有被风吹折,因新断处比前一次低0.5米,故杆顶着地处E比C远一米.求原标杆的高.道理清楚写!
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/09 10:24:07
AQUESTIONABOUTMATHS有一直立标杆,它的上部被风从B处吹折,杆顶C着地,离杆脚2米.修好后有被风吹折,因新断处比前一次低0.5米,故杆顶着地处E比C远一米.求原标杆的高.道理清楚写!A
A QUESTION ABOUT MATHS 有一直立标杆,它的上部被风从B处吹折,杆顶C着地,离杆脚2米.修好后有被风吹折,因新断处比前一次低0.5米,故杆顶着地处E比C远一米.求原标杆的高.道理清楚写!
A QUESTION ABOUT MATHS
有一直立标杆,它的上部被风从B处吹折,杆顶C着地,离杆脚2米.修好后有被风吹折,因新断处比前一次低0.5米,故杆顶着地处E比C远一米.求原标杆的高.
道理清楚写!
A QUESTION ABOUT MATHS 有一直立标杆,它的上部被风从B处吹折,杆顶C着地,离杆脚2米.修好后有被风吹折,因新断处比前一次低0.5米,故杆顶着地处E比C远一米.求原标杆的高.道理清楚写!
设标杆高X米,标杆从杆脚到B处高Y米.
Y^2+2^2=(X-Y)^2……(1)
(Y-0.5)^2+(2+1)^2=(X-Y+0.5)^2……(2)
由(1)得:
X^2-2XY=4
由(2)得:
X^2-2XY+X=9
两相减,得:
X=5
原标杆的高为5米.
I have a question about r_____ English
I have a question,not about you.
a bamboo mat怎么读
A question about keyboard operatorWhere is colon on the keyboard
A question about marionberry.What is marionberry in Chinese?
i have a question about how to fxxx
#include #include #include #include using namespace std ;typedef vector < vector > Mat ;Mat input() ;void mySort(Mat& a) ;void print(const Mat& a) ;int main(){Mat a = input() ;mySort(a) ;print(a) ;system (PAUSE) ;return 0 ;}Mat input(){ifstream in(
there is a camera on the mat
what's the question about?
The book________ tells about how to get along with others.A.in question B.out of the question C.out of question D.with regard to
question about 和doubt about 的区别
no question is a question
A question about the English Civil WarWho was a major figure during the English Civil War?
can you ___ question about your vacation?Can you ___ question about your vacation?A.make B.do C.give D.put
She is so particular about her food that to eat what is available,i'm afraid,is ( )a:out of question b:out of a question c:out of the question d:out question
This is a question much talked about by many people.怎么翻译
Do you know the answer _____this question?A.to B.of C.with D.about
I donnot know the answer - ---the question.A of B to C about D for