x^8+x^7+1 x^8+x^7+1
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x^8+x^7+1x^8+x^7+1x^8+x^7+1x^8+x^7+1x^8+x^7+1x^8+x^7+1您好:X^8+X^7+1=X^8+X^7+X^6-X^6+1=X^6(X^2+X+1)-(X
x^8+x^7+1 x^8+x^7+1
x^8+x^7+1
x^8+x^7+1
x^8+x^7+1 x^8+x^7+1
您好:
X^8+X^7+1
=X^8+X^7+X^6-X^6+1
=X^6(X^2+X+1)-(X^6-1)
=X^6(X^2+X+1)-(X^3+1)(X^3-1)
=X^6(X^2+X+1)-(X^3+1)(X-1)(X^2+X+1)
=(X^2+X+1)[X^6-(X^3+1)(X-1)]
=(X^2+X+1)(X^6-X^4+X^3-X+1)
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x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
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[(x+2)/(x+3)-(x+1)/(x+2)+(x+4)/(x+5)-(x+3)/(x+4)]/[(x的平方+7x+13)/(x的平方+8x+15)]
计算:[(x+2)/(x+3) - (x+1)/(x+2) + (x+4)/(x+5) - (x+3)/(x+4) / (x^2 + 7x + 13)/(x^2 + 8x + 15)
解决数独问题x 1 x 7 x x x 3 xx x x x 4 x 2 x x9 x 3 6 x 8 7 x 58 x x x x 9 x x xx x 2 x 5 x x x 4x 3 x x x x 6 x xx x x x x x x x 26 x x x x x x x 7x 5 4 1 7 x 9 8 x这道题我用了很多办法都没有头绪,请帮忙的朋友把解题的思
x^8+x^7+1 x^8+x^7+1
(x+1)(x+2)(x+7)(x+8)+8因式分解
(x+1)(x+2)(x+7)(x+8)+8
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