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初中第三册 期末考前典型题分类精讲

初中第三册 期末考前典型题分类精讲. 上 学. 36 百米. 60 百米. 回 家. 家. 家. 学校. 学校. A. 36 百米. 60 百米. 2 百米 / 分钟. 5 百米 / 分钟. 5 百米 / 分钟. 2 百米 / 分钟. (2) S △AOP = ah. P′. 1. 1. 1. 1. 1. 1. 1. 1. · OA · y. =. =. =. ×1×( - 2x + 2). - x + 1. - x + 1. - x + 1. 2. 2. 3. 2. 2. 2. 2. 2.

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初中第三册 期末考前典型题分类精讲

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  1. 初中第三册 期末考前典型题分类精讲

  2. 学 36百米 60百米 回 家 家 家 学校 学校 A 36百米 60百米 2百米/分钟 5百米/分钟 5百米/分钟 2百米/分钟

  3. (2) S△AOP= ah P′ 1 1 1 1 1 1 1 1 ·OA· y = = = ×1×(-2x+2) -x+1 -x+1 -x+1 2 2 3 2 2 2 2 2 ∴ S = = x= (3) S= 时, ∴Q ( , 0) ∴P ( , 1) 解:(1)点B的坐标为(0,2) (0,2) (1,0) y=-2x+2 (0<x<1) y PB′=-6x+2

  4. x≥3 3辆 -3x+20≥3 4辆 20-x-( -3x+20)≥3 5辆 X辆 y辆 (20-x-y)辆 y =-3x+20 W =96x+96(-3x+20) +50(20-x-( -3x+20 )) =-92x+1920 1644(百元)164400元 11辆 6辆 8辆 8辆 5辆 10辆

  5. 2 3 1

  6. y AB= x+6 M 3 2 (0,6) (-2,3) P (-4,0)

  7. 60°

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