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1. f(x)=A_7 x⁷ + A_6 x⁶ + A_5 x⁵ + A_4 x⁴ + A_3 x³ + A_2 x² + A_1 x + A_0 // •r(sh¨ª)ég-λÖÃÇú¾€
2. f'(x)=7A_7 x⁶ + 6A_6 x⁵ + 5A_5 x⁴ + 4A_4 x³ + 3A_3 x² + 2A_2 x + A_1 // •r(sh¨ª)ég-ËÙ¶ÈÇú¾€
3. f''(x)=42A_7 x⁵ + 30A_6 x⁴ + 20A_5 x³ + 12A_4 x² + 6A_3 x + 2A_2 // •r(sh¨ª)ég¼ÓËÙ¶ÈÇú¾€
4. f'''(x)=210A_7 x⁴ + 120A_6 x³ + 60A_5 x² + 24A_4 x + 6A_3 // •r(sh¨ª)ég¼Ó¼ÓËÙ¶ÈÇú¾€
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