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证明:
$$
\left|\begin{array}{cccc}
a^2 & (a+1)^2 & (a+2)^2 & (a+3)^2 \\
b^2 & (b+1)^2 & (b+2)^2 & (b+3)^2 \\
c^2 & (c+1)^2 & (c+2)^2 & (c+3)^2 \\
d^2 & (d+1)^2 & (d+2)^2 & (d+3)^2
\end{array}\right|=0 ;
$$
                        
不再提醒