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歡迎您訪問(wèn)數(shù)學(xué)考題練習(xí):反比例函數(shù)的圖象經(jīng)過(guò)點(diǎn)P(3,4),則這個(gè)反比!

數(shù)學(xué)考題練習(xí):反比例函數(shù)的圖象經(jīng)過(guò)點(diǎn)P(3,4),則這個(gè)反比

更新時(shí)間:2024-01-12 16:33:21作者:貝語(yǔ)網(wǎng)校

反比例函數(shù)的圖象經(jīng)過(guò)點(diǎn)P(3,4),則這個(gè)反比例函數(shù)的解析式為

A.

B.

C.

D.

試題答案

A

試題解析

把已知點(diǎn)的坐標(biāo)代入可求出k值,即得到反比例函數(shù)的解析式.

解答:設(shè)反比例函數(shù)的解析式為y=(k≠0),

因?yàn)楹瘮?shù)經(jīng)過(guò)點(diǎn)P(3,4),

∴4=,

得k=12,

∴反比例函數(shù)解析式為y=.

故選A.

點(diǎn)評(píng):本題比較簡(jiǎn)單,考查的是用待定系數(shù)法求反比例函數(shù)的解析式,是中學(xué)階段的重點(diǎn)內(nèi)容.

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