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[數(shù)學(xué)]用matlab學(xué)習(xí)線性代數(shù)_線性方程組與矩陣代數(shù)(編輯修改稿)

2024-09-13 02:09 本頁面
 

【文章內(nèi)容簡介】 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 a(:,7)xans = (2) A=floor(20*rand(6))。 B=floor(20*rand(6,1))10。 A(:,3)=A(:,1:2)*[4 3]39。 rref([A B])ans = 1 0 4 0 0 0 0 0 1 3 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1(3) y=floor(20*rand(6,1))10。 A=floor(20*rand(6))。 A(:,3)=A(:,1:2)*[4 3]39。 c=A*yc = 184 289 139 197 147 292 rref([A c])ans = 1 0 4 0 0 0 1 0 1 3 0 0 0 6 0 0 0 1 0 0 8 0 0 0 0 1 0 1 0 0 0 0 0 1 6 0 0 0 0 0 0 0(4) A=floor(20*rand(6))。 A(:,3)=A(:,1:2)*[4 3]39。 y=floor(20*rand(6,1))10。 c=A*y。 U=rref([A c])U = 1 0 4 0 0 0 23 0 1 3 0 0 0 17 0 0 0 1 0 0 9 0 0 0 0 1 0 0 0 0 0 0 0 1 7 0 0 0 0 0 0 0 w=[23,17,0,9,0,7]39。 A*wcans = 0 0 0 0 0 0(5) A=floor(20*rand(6))。 A(:,3)=A(:,1:2)*[4 3]39。 U=rref(A)U = 1 0 4 0 0 0 0 1 3 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 Z=[4,3,1,0,0,0]39。 A*Zans = 0 0 0 0 0 0(6) A=floor(20*rand(6))。A(:,3)=A(:,1:2)*[4 3]39。 y=floor(20*rand(6,1))10。 c=A*y。 U=rref([A c])。 U(:,7)=zeros(6,1)U = 1 0 4 0 0 0 0 0 1 3 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 U=rref([A c])U = 1 0 4 0 0 0 23 0 1 3 0 0 0 22 0 0 0 1 0 0 4 0 0 0 0 1 0 9 0 0 0 0 0 1 6 0 0 0 0 0 0 0 z=[4,3,1,0,0,0]39。 w=[23,22,0,4,9,6]39。 v=w+3*z; A*vcans = 0 0 0 0 0 0第六題 :(1)A=[0,1,0,1,0,0,0,1。1,0,1,0,0,0,1,0。0,1,0,1,0,0,0,0。1,0,1,0,1,0,0,0。0,0,0,1,0,1,0,0。0,0,0,0,1,0,1,0。0,1,0,0,0,1,0,1。1,0,0,0,0,0,1,0]A = 0 1 0 1 0 0 0 1 1 0 1 0 0 0 1 0 0 1 0 1 0 0 0 0 1 0 1 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 0 1 0 0 1 0 0 0 1 0 1 1 0 0 0 0 0 1 0(2) A^2ans = 3 0 2 0 1 0 2 0 0 3 0 2 0 1 0 2 2 0 2 0 1 0 1 0 0 2 0 3 0 1 0 1 1 0 1 0 2 0 1 0 0 1 0 1 0 2 0 1 2 0 1 0 1 0 3 0 0 2 0 1 0 1 0 2 A1=A^2+AA1 = 3 1 2 1 1 0 2 1 1 3 1 2 0 1 1 2 2 1 2 1 1 0 1 0 1 2 1 3 1 1 0 1 1 0 1 1 2 1 1 0 0 1 0 1 1 2 1 1 2 1 1 0 1 1 3 1 1 2 0 1 0 1 1 2sum(sum(A1(1:8,1:8)))ans = 72 (3) A2=A^4+AA2 = 18 1 13 1 9 0 15 1 1 18 1 15 0 9 1 13 13 1 10 1 7 0 10 0 1 15 1 15 1 8 0 10 9 0 7 1 7 1 8 0 0 9 0 8 1 7 1 7 15 1 10 0 8 1 15 1 1 13 0 10 0 7 1 10 sum(sum(A2(1:8,1:8)))ans = 368 A3=A^6+A。A3 = 119 1 86 1 64 0 103 1 1 119 1 103 0 64 1 86 86 1 63 1 47 0 73 0 1 103 1 93 1 56 0 73 64 0 47 1 38 1 56 0 0 64 0 56 1 38 1 47 103 1 73 0 56 1 93 1 1 86 0 73 0 47 1 63 sum(sum(A3(1:8,1:8)))ans = 2362 A4=A^8+AA4 = 799 1 577 1 436 0 697 1 1 799 1 697 0 436 1 577 577 1 418 1 316 0 501 0 1 697 1 614 1 381 0 501 436 0 316 1 243 1 381 0 0 436 0 381 1 243 1 316 697 1 501 0 381 1 614 1 1 577 0 501 0 316 1 418 sum(sum(A4(1:8,1:8)))ans = 15800(4) A5=A^3+AA5 = 0 8 0 7 0 3 0 6 8 0 6 0 3 0 7 0
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