\(\left\{ \begin{array}{l}{u_1} + 2{u_5} = 0\\{S_{14}} = 98\end{array} \right.\)
A.\({u_1} = \dfrac{{112}}{{23}};\,\,d = \dfrac{{42}}{{23}}\)
B.\({u_1} = - \dfrac{{112}}{{23}};\,\,d = \dfrac{{42}}{{23}}\)
C.\({u_1} = - \dfrac{{112}}{{23}};\,\,d = -\dfrac{{42}}{{23}}\)
D.\({u_1} = \dfrac{{112}}{{23}};\,\,d = -\dfrac{{42}}{{23}}\)
A.\({u_1} = \dfrac{{112}}{{23}};\,\,d = \dfrac{{42}}{{23}}\)
B.\({u_1} = - \dfrac{{112}}{{23}};\,\,d = \dfrac{{42}}{{23}}\)
C.\({u_1} = - \dfrac{{112}}{{23}};\,\,d = -\dfrac{{42}}{{23}}\)
D.\({u_1} = \dfrac{{112}}{{23}};\,\,d = -\dfrac{{42}}{{23}}\)
Loga
Hóa Học lớp 12
