行列式下面的题型怎么做？
\u4e00\u9053\u9898 \u884c\u5217\u5f0f \u600e\u6837\u505a\u554aD= \u7b2c1\u884c\u52a0\u4e0a\u7b2c2\u884c
x+3 x+3 0
2 x+1 1
-1 1 x+1 \u7b2c2\u5217\u51cf\u53bb\u7b2c1\u5217
=
x+3 0 0
2 x-1 1
-1 2 x+1 \u6309\u7b2c1\u884c\u5c55\u5f00
=
(x+3)*(x^2-1-2)=0
\u89e3\u5f97
x= -3\uff0c\u221a3\u6216-\u221a3
\u53c2\u8003\u8fd9\u4e2a\u9898\u7684\u505a\u6cd5\u5427\u3002\u82e5\u4ecd\u7136\u4e0d\u80fd\u89e3\u51b3\u95ee\u9898\uff0c\u6b22\u8fce\u8ffd\u95ee\u3002
http://zhidao.baidu.com/question/2138031057336373828
\u5316\u4e3a\u4e09\u89d2\u5f62\uff01\u3010\u4e0d\u8bba\u5316\u4e3a \u4e0a\u4e09\u89d2 \u8fd8\u662f \u4e0b\u4e09\u89d2\uff0c\u4e5f\u4e0d\u8bba\u662f\u7528\u884c\u53d8\u6362\u8fd8\u662f\u5217\u53d8\u6362\u3002\u65b9\u6cd5\u5f88\u591a\uff01\u3011
\u4e0b\u9762\u7684\u65b9\u6cd5\u7528\u3010\u884c\u53d8\u6362\u3011\u5316\u4e3a\u3010\u4e0a\u4e09\u89d2\u3011\uff1a
r(n+1)-rn*b/a\u3001r(n+2)-r(n-1)*b/a\u3001\u3002\u3002\u3002\u3001r2n-r1*b/a
\u5219n\u884c\u4ee5\u540e\u5404\u5bf9\u89d2\u7ebf\u5143\u7d20\u4e3a a-b^2/a (\u5171n\u4e2a\u2014\u2014 \u4ece n+1\u52302n)
\u2234 D2n=a^n(a-b^2/a)^n=[a(a-b^2/a)]^n
=(a^2-b^2)^n
=(a+b)^n*(a-b)^n
\u3010\u5176\u4e2d\u7684 a\u3001b\u6362\u6210\u76f8\u5e94\u7684 a1\u3001b1\u3001c1\u3001d1\u5373\u53ef\u3011
c2-a2c(n+1)
...
cn-anc(n+1)
行列式化为上三角行列式
行列式等于主对角线上元素的乘积
D = (x-a1)(x-a2)...(x-an)
叠加法吧？
绛旓細鎷嗗垎娉曞皢琛屽垪寮忛傚綋鎷嗗垎鎴愯嫢骞蹭釜鍚岄樁琛屽垪寮忎箣鍜岋紝鐒跺悗姹傚嚭鍚勯樁琛屽垪寮忕殑鍊硷紝鍗冲緱鍘熻鍒楀紡鐨勫硷紱•7.鍒╃敤鏁板褰掔撼娉曟暟瀛﹀綊绾虫硶杩涜璁＄畻鎴栬瘉鏄庯紱鏁板褰掔撼娉•8.鍒╃敤宸茬煡琛屽垪寮忚繘琛岃绠楋紝鏈閲嶈鐨勫凡鐭ヨ鍒楀紡鏄寖寰疯挋琛屽垪寮.鐗规畩棰樺瀷.鐗规畩棰樺瀷.渚嬮锛•1.闈為浂鍏冪礌鐗瑰埆灏戯紙灏戜簬2n涓級锛...
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