Use Cramer's rule to solve the unknown of the system: x + 2y =2 - z,3x - 6y = 2 - 2x,2x =8 + z
i.x =2, y=1/3, z=-2
ii.x =-3,y =2, z=-1/2
iii.x =4,y =-1/2, z =-3
iv.x =3, y =1/2, z=-2
1
Expert's answer
2021-08-26T01:06:53-0400
x+2y+z=25x−6y=22x−z=8We can write this in matrix form⎝⎛1522−6010−1⎠⎞⎝⎛xyz⎠⎞=⎝⎛228⎠⎞Next,we use the Cramer’s rule to to solve the system of equationsdetA=1∣∣52−60∣∣−1∣∣152−6∣∣=28δx=∣∣2282−6010−1∣∣=64δy=∣∣15222810−1∣∣=44δz=∣∣1522−60228∣∣=−96Therefore using Kramer’s rule we have that, x=2864=2.29y=2844=1.57z=28−96=−3.42Hence, the values of x,y and z are 2, 2 and -3 approximately
Comments
Leave a comment