I have this system:
$$ y[n] = -\frac{1}{2} x[n+2] - y[n+1] $$
I have no idea how to prove if the system is linear or not, because, it depends on future outputs...
Thanks for the help
Apparently the of last four, $\ce{Mg^2+}$ is closest in radius to $\ce{Li+}$. Is this true, and if so, why would a whole larger shell ($\ce{...
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