亚洲男人天堂av,国产一区二区久久精品,国产精品一区二区久久精品,国产精品久久久久久一区二区三区,五月婷婷在线观看视频,亚洲狠狠色丁香婷婷综合

歡迎您訪問數(shù)學(xué)考題練習(xí):已知矩形ABCD面積是8,長為y,寬為x.則y!

數(shù)學(xué)考題練習(xí):已知矩形ABCD面積是8,長為y,寬為x.則y

更新時間:2024-01-12 16:27:52作者:貝語網(wǎng)校

已知矩形ABCD面積是8,長為y,寬為x.則y關(guān)于x的函數(shù)圖象大致是

A.

B.

C.

D.

試題答案

A

試題解析

據(jù)題意有:xy=8,故y與x之間的函數(shù)圖象為反比例函數(shù),且根據(jù)x、y實際意義,x、y應(yīng)大于0,其圖象應(yīng)在第一象限.

解答:由矩形的面積公式可得:xy=8,

所以y=,(x>0,y>0).

故選A.

點評:本題考查了反比例函數(shù)的圖象及實際應(yīng)用,解答該類問題的關(guān)鍵是確定兩個變量之間的函數(shù)關(guān)系,然后利用實際意義確定其所在的象限.

為您推薦

數(shù)學(xué)考題練習(xí):為了有效抗旱,某縣大力加強水利設(shè)施的建設(shè).20

為了有效抗旱,某縣大力加強水利設(shè)施的建設(shè).2010年底全縣水庫總?cè)萘繛?00萬m3,計劃到2012年底全縣水庫總?cè)萘窟_到338萬m3,則2010~2012這兩年水庫總?cè)萘康钠骄暝鲩L率為________.

2024-01-12 16:27

數(shù)學(xué)考題練習(xí):函數(shù)y=kx的圖象經(jīng)過點P(-1,3),則k的

函數(shù)y=kx的圖象經(jīng)過點P(-1,3),則k的值為A.3B.-3C.D.-

2024-01-12 16:27

數(shù)學(xué)考題練習(xí):如圖,△ABC中,AD是BC邊上的中線,F(xiàn)是A

如圖,△ABC中,AD是BC邊上的中線,F(xiàn)是AD上一點,有AF:FD=1:5,連接CF,并延長交AB于E,則AE:EB等于A.1:6B.1:8C.1:9D.1:10

2024-01-12 16:27

數(shù)學(xué)考題練習(xí):已知f(x)=ax2+bx+c(其中a、b、c

已知f(x)=ax2+bx+c(其中a、b、c為常數(shù),且a≠0),小紅在用描點法畫y=f(x)的圖象時,列出如表格.根據(jù)該表格,下列判斷中,不正確的是x…-1012…y…0343…A.拋物線y=f(x)開口向下B.拋物線y=f(x)的對稱軸

2024-01-12 16:27

數(shù)學(xué)考題練習(xí):下列分式是最簡分式的

下列分式是最簡分式的A.B.C.D.

2024-01-12 16:27

數(shù)學(xué)考題練習(xí):將多項式x2y-4y分解因式,其中結(jié)果正確的是

將多項式x2y-4y分解因式,其中結(jié)果正確的是A.y(x+2)(x-2)B.y(x+4)(x-4)C.y(x2+2)(x2-2)D.y(x-2)2

2024-01-12 16:27

加載中...
主站蜘蛛池模板: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |