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Karolina [17]
3 years ago
9

2x+ky=7 and 4x-9y=4 find value of k if matrix of coefficients is singular

Mathematics
1 answer:
lesya [120]3 years ago
5 0
Hello,

| 2  k|
|4 -9 |=6

==>2*(-9)-4*k=0
==>k=-9/2

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