13. let a =| a, jnxm ae r with p(a) =r. ifa is number of non-zero eigen value of a, then (a) =r (b) a = = r only if a is a symmetric (c) r2a (d) r

13. Let A =| a, Jnxm aE R with p(A) =r. Ifa is number of non-zero eigen value of A, then (a) =r (b) a = = r only if A is a symmetric (c) r2a (d) r

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