Find the determinant of the following matrix:
A=[1+x21x1x2...x1xnx2x11+x22...x2xn............xnx1xnx2...1+x2n]
I computed for the case n=2, and n=3 and guessed that det should be 1+\sum_{i=1}^n x_i^2 but not sure how to proceed for any n.
How to find \lim_{h\rightarrow 0}\frac{\sin(ha)}{h} without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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