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2.根據(jù)下列5個(gè)圖形及相應(yīng)點(diǎn)的個(gè)數(shù)的變化規(guī)律,試猜測(cè)第個(gè)圖中有_________個(gè)點(diǎn).
(1) (2) (3) (4) (5)
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