<prompt> Ruhusu mathbfM anzepmatrix 1 -4 1 2 endpmatrix. Tafuta viasili a na b ilimathbfM-1 a mathbfM b mathbfI.Ingiza jozi iliyoagizwa a,b.  <response>: Tuna hiyoanzapmatrix 1 -4 1 2 mwishopmatrix-1 frac112 - -41 anza pmatrix 2 4 -1 1 mwishopmatrix anzapmatrix frac13 frac23 -frac16 frac16 endpmatrix.Pia,a mathbfM b mathbfI a anzapmatrix 1 -4 1 2 mwishopmatrix b anzapmatrix 1 0 0 1 mwishopmatrix anzapmatrix a b -4a a 2a b mwishopmatrix.Hivyo, a b frac13, -4a frac23, a -frac16, na 2a b frac16. Inatatua, tunapata a,b kushoto -frac16, frac12 kulia. 