Các câu hỏi tương tự
Find n such that A= n^3-2n^2+2n-4 is a prime number?
let m and n bel positive integers such that the fraction m/n is irreducible and the fraction 4m+3n/5m+2n is not irreducible. Find the greatest common divisor of 4m+3n and 5m+2n
The sum of all possible natural number n such that : n2+n+1589 is a perfect square is
Find n if n and \(n^3+2n^2+2n+4\) are both perfect square numbers
Let a,b,c,k be positive real numbers such that kleft(ab+bc+caright)+2abcle k^3 . Prove that:left(1right)kleft(a+b+cright)ge2left(ab+bc+caright)left(2right)kleft(a^3+b^3+c^3right)ge2left(a^2b^2+b^2c^2+c^2a^2right)left(3right)kleft(a^{2n-1}+b^{2n-1}+c^{2n-1}right)ge2left(a^nb^n+b^nc^n+c^na^nright) left(nge0;nin Rright)
Đọc tiếp
Let \(a,b,c,k\) be positive real numbers such that \(k\left(ab+bc+ca\right)+2abc\le k^3\) . Prove that:
\(\left(1\right)k\left(a+b+c\right)\ge2\left(ab+bc+ca\right)\)
\(\left(2\right)k\left(a^3+b^3+c^3\right)\ge2\left(a^2b^2+b^2c^2+c^2a^2\right)\)
\(\left(3\right)k\left(a^{2n-1}+b^{2n-1}+c^{2n-1}\right)\ge2\left(a^nb^n+b^nc^n+c^na^n\right)\) \(\left(n\ge0;n\in R\right)\)
Tìm stn n sao cho :
a, (a^4-2n^3+2n^2-2n+1) chi hết cho (n^4-1)
b, (n^3-n^2+2n+7) chia hết cho (n^2+1)
Find a 3-digit number, know that that number is divisible by 18 and its proportional numerals 1, 2, 3?
2) Tìm x thuộc Z , để:
a) \(n^2+2n-4⋮11\)
b)\(n^4-2n^3+2n^2-2n+1⋮n^4+1\)
c)\(n^3-n^2+2n+7⋮n^2+1\)
Tìm số nguyên n sao cho
a) (2n^3 + n^2 + 7n + 1) chia hết cho 2n-1
b)(n^3 - 2) chia hết cho n-2
c)(n^3 - 3n^2 - 3n -1) chia hết cho n^2 + n + 1
d)((n^4 - 2n^3 = 2n^2 - 2n + 1) chia hết cho n^4 - 1
e)(n^3 - n^2 + 2n + 7) chia hết cho n^2 + 1