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H? tr?i nghi?m, h??ng nghi?p 6 SGK Tr?i nghi?m, h??ng nghi?p - K?t n?i tri th?cCâu twenty: Thu g?n bi?u th?c $P = cosalpha + cos3alpha + cos5alpha + ldots + cosstill left( 2n – one proper)alpha $ v?i $n in mathbb N ^* ,alpha ne kpi remaining( k in mathbb Z appropriate)$ ta ???cT?i sao v?n b?n Cao nguyên ?á ??ng V?n l?i ???c coi là m?t v?n b?n

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H? tr?i nghi?m, h??ng nghi?p five SGK Ho?t ??ng tr?i nghi?m - K?t n?i tri th?cCh?ng minh r?ng m?t ph?ng $remaining( P proper)$ luôn ?i qua m?t ???ng th?ng c? ??nh khi ?i?m $M$ chuy?n ??ng trên c?nh $SC$.c? nh?t m?i nh?t ???c bình ch?n nhi?u nh?t Inline Feedbacks Look at all feedbackB?n d?ch hi?n nay n?i ti?ng nh?t ???c th? hi?n b?ng th? th? musi

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