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歡迎您訪問(wèn)數(shù)學(xué)考題練習(xí):函數(shù)y=kx-k-1(常數(shù)k>0)的圖象不經(jīng)過(guò)!

數(shù)學(xué)考題練習(xí):函數(shù)y=kx-k-1(常數(shù)k>0)的圖象不經(jīng)過(guò)

更新時(shí)間:2024-01-12 14:10:00作者:貝語(yǔ)網(wǎng)校

函數(shù)y=kx-k-1(常數(shù)k>0)的圖象不經(jīng)過(guò)的象限是

A.第一象限

B.第二象限

C.第三象限

D.第四象限

試題答案

B

試題解析

根據(jù)k的取值范圍確定-k-1的符號(hào),從而確定一次函數(shù)不經(jīng)過(guò)的象限.

解答:∵k>0

∴-k<0,

∴-k-1<0

∴y=kx-k-1(常數(shù)k>0)的圖象經(jīng)過(guò)一、三、四象限,

故選B.

點(diǎn)評(píng):本題考查了一次函數(shù)圖象與系數(shù)的關(guān)系,解題的關(guān)鍵是牢記比例系數(shù)對(duì)函數(shù)圖象的影響.

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