4k^3+6k^2+k+1=0.求K~

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4k^3+6k^2+k+1=0.求K~

ans =
-1/12*(324+12*633^(1/2))^(1/3)-2/(324+12*633^(1/2))^(1/3)-1/2;
1/24*(324+12*633^(1/2))^(1/3)+1/(324+12*633^(1/2))^(1/3)-1/2+1/2*i*3^(1/2)*(-1/12*(324+12*633^(1/2))^(1/3)+2/(324+12*633^(1/2))^(1/3));
1/24*(324+12*633^(1/2))^(1/3)+1/(324+12*633^(1/2))^(1/3)-1/2-1/2*i*3^(1/2)*(-1/12*(324+12*633^(1/2))^(1/3)+2/(324+12*633^(1/2))^(1/3));

4k^3+6k^2+k+1=0.求K~ c语言求1^k+2^k+3^k+……+n^k,假定n=6,k=4 求证：lim1^k+2^k+3^k+4^k+.n^k/n^(k+1)=1/k+1 K-1+K+2+K/3+K*3=2001 请问1^k+2^k+3^k+.+n^k=? 3×k×k-2k-1=-1.k等于 k^4+2k^2-6k-3=0 2k³-6k²+6k-3=0 求k值 k方+k-1=0 求k^3+2k^2+2009 1k、2k、3k是什么意思 -2=-6k+b和3=4k+b .怎么求k和b? 2k/3h-2k=3k/4k-6h