\(\left\{ \begin{array}{l}{u_2} - 3{u_8} = - 20\\{u_3}{u_4} = 24\end{array} \right.\)
A.\(\left[ \begin{array}{l}{u_1} = 14;\,\,d = - 2\\{u_1} = \frac{6}{7};\,\,d = - \frac{{19}}{{28}}\end{array} \right.\)
B.\({u_1} = - \frac{6}{7};\,\,d = \frac{{19}}{{28}}\)
C.\({u_1} = - 14;\,\,d = 2\)
D.\(\left[ \begin{array}{l}{u_1} = - 10,\,\,d = 2\\{u_1} = \frac{{45}}{{14}},\,\,d = \frac{{19}}{{28}}\end{array} \right.\)
A.\(\left[ \begin{array}{l}{u_1} = 14;\,\,d = - 2\\{u_1} = \frac{6}{7};\,\,d = - \frac{{19}}{{28}}\end{array} \right.\)
B.\({u_1} = - \frac{6}{7};\,\,d = \frac{{19}}{{28}}\)
C.\({u_1} = - 14;\,\,d = 2\)
D.\(\left[ \begin{array}{l}{u_1} = - 10,\,\,d = 2\\{u_1} = \frac{{45}}{{14}},\,\,d = \frac{{19}}{{28}}\end{array} \right.\)
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