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Let A=a0 be a matrix of order 3, where a...

Let `A=a_0` be a matrix of order 3, where `a_(i j){x ; ifi=j ,x in R1; if|i-j|=1;0;ot h e r w i s e` then when of the following Hold (s) good: for`x=2` , `A` is a diagonal matrix `A` is a symmetric matrix for`x=2` , det `A` has the value equal to 6 Let `f(x)=` , det `A ,` then the function `f(x)` has both the maxima and minima.

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