Mathematics
Junior High
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3. 如右圖,每一方格中都有一數,共有25個數,且已知其中3個數。若每一横
列的五個數由左至右都是公差為d的等差數列,每一直行的五個數由上至下
都是公差為d2的等差數列。求:
(1)d=?(4分) (2)d2=?(4分) (3)斜線方格中的數是多少?(4分)
116
3
2.
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