(1/3)k(4k^2-1)+(2k+1)^2为什么=(1/3)(k+1)[4(k+1)^2-1]要什么公式?求详解
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(1/3)k(4k^2-1)+(2k+1)^2为什么=(1/3)(k+1)[4(k+1)^2-1]要什么公式?求详解
(1/3)k(4k^2-1)+(2k+1)^2为什么=(1/3)(k+1)[4(k+1)^2-1]
要什么公式?求详解
(1/3)k(4k^2-1)+(2k+1)^2为什么=(1/3)(k+1)[4(k+1)^2-1]要什么公式?求详解
(1/3)k(4k^2-1)+(2k+1)^2
=(1/3)k(2k-1)(2k+1)+(2k+1)^2
=(1/3)(2k+1)[ k(2k-1) +3(2k+1) ]
=(1/3)(2k+1)(2k^2+5k+3)
=(1/3)(2k+1)(2k+3)(k+1)
=(1/3)(k+1)( 4k^2+8k+3 )
=(1/3)(k+1)( 4(k+1)^2 -1)
(1/3)k(4k^2-1)+(2k+1)^2
=(1/3)k(2k-1)(2k+1)+(2k+1)^2
=(1/3)(2k+1)[k(2k-1)+3(2k+1)]
=(1/3)(2k+1)(2k^2+5k+3)
=(1/3)(2k+1)(2k+3)(k+1)
(1/3)(k+1)[4(k+1)^2-1]
=(1/3)(k+1)[2(k+1)-1][2(k+1)+1]
=(1/3)(k+1)(2k+1)(2k+3)
(4k^2+7k)+(-k^2+3k-1)
[k*(2-4k)/(1+2k)]+2k+1
3×k×k-2k-1=-1.k等于
请问1^k+2^k+3^k+.+n^k=?
2k/(3k-1)=4k/(3k+2)求k
k(k+2)(2k+5)+3 如何变成 (k+1)(k+3)(2k+1)
4k^2-4(k+1)(k-3)
数式变形(1) K^3-2K+4/K
求证:lim1^k+2^k+3^k+4^k+.n^k/n^(k+1)=1/k+1n是正整数,后面的k+1有括号的
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当k等于?时,3k(2k-5)+2k(1-3k)=52
证明:1/(3k+2)+1/(3k+3)+1/(3k+4)>1/(k+1)
数学方程求解1-2k+k^2-2k^3-k^4=0
(3k^2+7k)+(4k^2-3k+1)
k-4-2k|/√(k^2+1)= 3 K=?
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