解方程:.
解:.······························································ 2分
.···································································· 3分
.··········································································· 4分
經(jīng)檢驗是原方程的解.
所以原方程的解是.········································································ 5分
科目:初中數(shù)學(xué) 來源: 題型:
如圖A、B、C、D為⊙O上的點,直線BA與DC相交于點P,PA=2,PC=CD=3,
則PB=( )
A.6 B.7 C.8 D.9
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科目:初中數(shù)學(xué) 來源: 題型:
已知:如圖,中,,于,平分,
且于,與相交于點是邊的中點,
連結(jié)與相交于點.
(1)判斷AC與圖中的那條線段相等,并證明你的結(jié)論;
(2)若的長為,求BG的長.
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