1.函數(shù)y=1/3x的圖象與x軸交點(diǎn)的坐標(biāo)是___,與y軸交點(diǎn)的坐標(biāo)是___.
2.函數(shù)y=2/x的圖象經(jīng)過(guò)點(diǎn)____,(只填一個(gè)點(diǎn)的坐標(biāo))
3.點(diǎn)A(2,3)在函數(shù)y=ax的平方-x+1的圖象上,則a的值為_(kāi)__.
4.已知函數(shù)u=x-2的圖象與x軸交于點(diǎn)A,與y軸交于點(diǎn)B,O為原點(diǎn),S△aob=___
5.若點(diǎn)(2,7)在函數(shù)y=ax的平方+b的圖象上,且x=-√3時(shí),y=5,求a.b的值.
6.在同一直角坐標(biāo)系中分別畫(huà)出函數(shù)y=-x與y=-1/x的圖象,試用這兩個(gè)圖象指出何時(shí)(當(dāng)x取什么值時(shí))有-x>-1/x.