Determine whether the following matrices have inverses. You need not compute inverses. (a) [ !] (b) [ 1 ] (d) [ _: - ]

--------- ----- - - - ~--- __ 'The.leaIsJrgvef5et5olv.flr9fM&_{i,J!---- - y[!r=tr-1w~~ r 'fa W/1 -)_= -,-.__~.~-.-.-- - -~ 1·---- - -- -~-~----------------- --- Y.::rr--l -~-~ ·---- LI Jrt:~- ll C.:-\1r ·-2. '{ =r.-I;=----------------~ -~-~-- 1---- - ---·- --~~- +'111pht'+cw::. -1---~ r(r-\V +pr_r:+~1:r0 -~------- __ V [rCr-1_(2L-tq:0 ___________ _ --· -~~~- rlr-t) +p+:r-0 ./ ----~ -E-~-p-k-~-- ---- -----------------~------ - i_o/vtLJI-L-l-+1A :: __ ...,.._- ____.,____, L;,(..w=~_______________ _ ____ 1__ V[rCr-1)+lf+2] :0: