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함께 풀고 싶은 문제
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[창의 퍼즐] 함수 2-1 경시출제문제
helena.t 2020.09.03 18:44 조회 600

다음 그림과 같이 한 변의 길이가 10인 정사각형 AOCB가 있다. 변 BC 위의 점 B, C가 아닌 다른 점 D를 지나는 직선 AD를 그어 x축과의 교점을 E라 할 때, △ADB와 △DCE의 넓이의 합이 사다리꼴 AOCD의 넓이와 같아지는 직선 AD의 기울기를 구하여라.

                                                                  |도내수학경시회|

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  •  
    해결
    mwryan Lv.6 2020.09.03 19:21 비밀댓글
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    다시 도전
    Plum Lv.7 2020.09.03 20:07 비밀댓글

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    해결
    수학중독자 Lv.2 2020.09.03 20:50 비밀댓글

    A PHP Error was encountered

    Severity: Warning

    Message: mkdir(): Permission denied

    Filename: libraries/Common.php

    Line Number: 202

    Backtrace:

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
    Line: 202
    Function: mkdir

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
    Line: 236
    Function: getLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
    Line: 90
    Function: parseLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
    Line: 343
    Function: view

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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    Function: view

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
    Line: 315
    Function: require_once

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    Line Number: 213

    Backtrace:

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
    Line: 213
    Function: file_put_contents

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
    Line: 236
    Function: getLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
    Line: 90
    Function: parseLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
    Line: 343
    Function: view

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
    Line: 558
    Function: view

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
    Line: 315
    Function: require_once

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    다시 도전
    오서준 Lv.6 2020.09.03 21:42 비밀댓글
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    해결
    황금 열쇠 Lv.7 2020.09.05 19:24 비밀댓글
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