Select one of the alternatives from the following questions as your answer- [????×???? = ????](a) A single linear equation with two or more unknowns must always has(A) No solution(B) Unique solution(C) Infinitely many solutions(D) None of the above
(b) If ???? is a 6×4 matrix and ???? is an ????×???? matrix such that ???????????????? is a 2×6 matrix,then the values of ???? ???????????? ???? are(A) ???? = 2, ???? = 4(B) ???? = 4, ???? = 2(C) ???? = 6, ???? = 2(D) ???? = 2, ???? = 6(c) If ???? = [1 22 4] , then(A) ????−1 = [4 −2−2 1](B) ????−1 = [4 22 1](C) ????−1 = [−1 22 −4](D) ????−1 does not exist(d) The transpose of upper triangular matrix is(A) Upper triangular matrix(B) Lower triangular matrix(C) Any matrix(D) Does not exist(e) If ???? = [1 32 5], then det (3????) is(A) −3(B) 6(C) 9(D) −9(f) If ???? = [2 31 4], then ???????????? is equal to(A) [13 1412 17](B) [13 1411 17](C) [13 1414 17](D) [13 1413 17]
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