解:(1)設(shè)總廠原來(lái)每周制作帳篷千頂.分廠原來(lái)每周制作帳篷千頂. 由題意.得······················································································· 3分 解得所以.. 答:在趕制帳篷的一周內(nèi).總廠.分廠各生產(chǎn)帳篷8千頂.6千頂.····························· 6分 總廠調(diào)配千頂帳篷到災(zāi)區(qū)的地.則總廠調(diào)配到災(zāi)區(qū)地的帳篷為千頂.分廠調(diào)配到災(zāi)區(qū)兩地的帳篷分別為千頂. 甲.乙兩市所需運(yùn)送帳篷的車(chē)輛總數(shù)為輛.······························································· 8分 由題意.得. 即.······················································································ 10分 因?yàn)?所以隨的增大而減。 所以.當(dāng)時(shí).有最小值60. 答:從總廠運(yùn)送到災(zāi)區(qū)地帳篷8千頂.從分廠運(yùn)送到災(zāi)區(qū)兩地帳篷分別為1千頂.5千頂時(shí)所用車(chē)輛最少.最少的車(chē)輛為60輛. 12分 查看更多

 

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用換元法解方程,若設(shè),則原方程化為關(guān)于的整式方程是

A、            B、       

C、                D、

 

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(2000•遼寧)用換元法解方程,設(shè),原方程可變?yōu)殛P(guān)于y的一元二次方程是   

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(2000•遼寧)用換元法解方程,設(shè),原方程可變?yōu)殛P(guān)于y的一元二次方程是   

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用換元法解方程,若設(shè),則原方程化為關(guān)于的整式方程是

A.B.
C.D.

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用換元法解方程數(shù)學(xué)公式,設(shè)數(shù)學(xué)公式,原方程可變?yōu)殛P(guān)于y的一元二次方程是________.

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