Ответ.....................
(8·5x¹⁷ +11·5x¹⁸) / (5x⁹·3)²·7=5x¹⁷(8+11·5) /5²·x¹⁸·3²·7=
=5¹⁻²·x¹⁷⁻¹⁸·(8+55)·3⁻²·7⁻¹=5⁻¹·x⁻¹·63·3⁻²·7⁻¹=
=5⁻¹·x⁻¹·7¹⁻¹·3²⁻²=(5x)⁻¹=1/5x
|2 4 4 |
|4 2 -4|
|4 -4 2|
det(2) >0
|2 4|
|4 2|
= 4-16 = -12 <0
|2 4 4 |
|4 2 -4| = 2*(4-16) -4*(8+16) +4*(-16-8) = -216 <0
|4 -4 2|
=> неопределенная.