Not known Details About on thi ghk 1 toan 11

H? tr?i nghi?m, h??ng nghi?p 11 SGK Ho?t ??ng 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 – 1 correct)alpha $ v?i $n in mathbb N ^* ,alpha ne kpi remaining( k in mathbb Z proper)$ ta ???c V?n 9 t?p one Cánh di?uKh?ng ??nh l?i m?t l?n n?a tình b?n ??

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