（x-1）的四次方可以化成什么 1/(x^3-1)可以化成什么
1/x\u7684m-1\u6b21\u65b9\u53ef\u4ee5\u5316\u6210\u4ec0\u4e48\u5f62\u5f0f\u5012\u6570\u5c31\u997f\u6307\u6570\u53d6\u76f8\u53cd\u65705
\u6240\u4ee5\u662fx\u76841-m\u6b21\u65b9
3\u76841-n\u6b21\u65b9
y'=y[(secx)^2*ln(sinx)+1]=(sinx)^tanx*[(secx)^2*lnsinx+1]
（x-1）的四次方=x^4-4x^3+6x^2-4x+1
(x-1)(x+1)(x+1)(x+1)
x分之一
绛旓細(x+1)²=x²+2x+1 (x+1)³=x³+3x²+3x+1 (x+1)^4=x^4+4x³+6x²+4x+1 ...^5=1...+5...+10...+10...+5...+1 ...^6=1...+6...+15...+20...+15...+6...+1 ...^7=1...+7...+21...+35...+35...+...
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绛旓細x浜旀鏂-x锛漻(x^4-1)=x(x^2+1)(x+1)(x-1)9x鍥涙鏂-36y骞虫柟=9(x^2+2y)(x^2-2y)9(2a+b)骞虫柟-24锛2a+b)(3a-b)+16(3a-b)骞虫柟 =[3(2a+b)]^2-2*[3(2a+b)]*[4(3a-b)]+[4(3a-b)]=[3(2a+b)-4(3a-b)]^2 =(7b-6a)^2 x骞虫柟锛4x-3y)+(3y-4x)=(x...
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绛旓細C(n,n-2)=C(n,2)=45 n*(n-1)/2=45 n^2-n-90=0 (n-10)(n+9)=0 n=10 锛1锛姹傚惈x3娆℃柟鐨勯」 C(10,m)*(1/X)^(m/4)*(x)^[2(10-m)/3)=C(10,m)*x^[2(10-m)/3-m/4)2(10-m)/3-m/4=3 m=4 鍗硏3娆℃柟鐨勯」涓篊(10,4)X^3=210X^3 锛2锛夋眰绯绘暟鏈澶...
绛旓細:(x-4)鐨剎-1娆℃柟绛変簬1 x-4=1 x=5 {x-4=-1 x=3 x-1鏄伓鏁 x=3 {x-4鈮0 x-1=0 寰梮=1 缁间笂鎵杩般傚師鏂圭▼鐨勮В鏄痻=5鎴杧=3鎴杧=1
绛旓細(X-1)²-49 =(x-1+7)(x-1-7)=(x+6)(x-8)9锛坅-b锛²-30锛坅-b锛+25 =[3(a-b)-5]²=锛3a-3b-5锛²x鐨勫洓娆℃柟-16y鐨勫洓娆℃柟 =(x²-4y²)(x²+4y²)=锛坸+2y锛夛紙x-2y锛(x²+4y²)锛坅+b锛²-9锛坅-b...
绛旓細=[x(x+1/x) * x^4(x^4+1/x^4)] / [x^2锛坸^2+1/x^2锛* x^3锛坸^3+1/x^3锛塢 鈶 ==[x(x+1/x) * x^4(x^4+2脳x²脳1/x²+1/x^4-2)] / [x^2锛坸^2+1/x^2锛* x^3*锛坸+1/x锛(x^2-x脳1/x+1/x^2)[ x^3+1/...
