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Clearnote
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Junior High
Mathematics
求解
Mathematics
Junior High
over 4 yearsago
珍珠💞
求解
響會考數學總複習講義 ( ) 「好痛! 我被毒蜘蛛 咬到了。 素養題 現在不是研究這個的時候 吧,要趕快解毒才行。 你開始在扣血了 耶,而且每次扣 的血量大又像有某 。 種規律。 若每秒損失的生命值成等差數列,第1秒扣12點,第2秒 24 點,………依此類推, 目前的生命值為2400點,則中毒後第幾秒的那一刻生命值會歸零? (A) 18 (B) 19 2400 = [24+ [h-1)/2 ) (C) 20 (D) 21 n²t n - 400=0. 24h tian²-12h = 4800 一題 即擇題 12n +12h - 480050 120 2 (nt (n- \
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