2/4X7+2/7X10+2/10X13+.2/94x97有点不解,请大虾们指导指导
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2/4X7+2/7X10+2/10X13+.2/94x97有点不解,请大虾们指导指导
2/4X7+2/7X10+2/10X13+.2/94x97
有点不解,请大虾们指导指导
2/4X7+2/7X10+2/10X13+.2/94x97有点不解,请大虾们指导指导
2/4X7+2/7X10+2/10X13+.2/94x97
=2/3(1/4-1/7+1/7-1/10+...+1/94-1/97)
=2/3(1/4-1/97)
=2/3×93/(4×97)
=93/(6×97)
=31/194
2/4X7+2/7X10+2/10X13+......2/94x97
=2×1/3×(1/4-1/7+1/7-1/10+……+1/94-1/97)
=2/3×93/(4×97)
=31/194
解: 增广矩阵 =
1 -2 4 -1 3
3 -7 6 1 5
-1 1 -10 5 -7
4 -11 -2 8 0
r2-3r1,r3+r1,r4-4r1
1 -2 4 -1 3
0 -1 -6 4 -4
0 -1 -6 4 -4
0 -3 -18 12 -12
r1-2...
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解: 增广矩阵 =
1 -2 4 -1 3
3 -7 6 1 5
-1 1 -10 5 -7
4 -11 -2 8 0
r2-3r1,r3+r1,r4-4r1
1 -2 4 -1 3
0 -1 -6 4 -4
0 -1 -6 4 -4
0 -3 -18 12 -12
r1-2r2,r3-r2r4-3r2,r2*(-1)
1 0 16 -9 11
0 1 6 -4 4
0 0 0 0 0
0 0 0 0 0
所以方程组的通解为: (11,4,0,0)'+c1(16,6,-1,0)'+c2(9,4,0,1)'
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