
very confused matrices
STUCK ON PART (III) hellp
(i) find the inverse of 4 1 k , k doesnt =5
3 2 5
8 5 13
DONE
(ii) solve the smultaneous equation
4x + y + 7z = 12
3x + 2y + 5z = m
8x + 5y +13z = 0
giving x,y,z in terms of m,,,DONE i got x= 611m
y= 6+2m
z=6+6m correct i think
(iii) find the value of p for which the simultaneous equations have solutions, and fn general solution in this case
4x+y+5z=12
3x+2y+5z=p
8x+5y+13z=0
how does it have solutions??,ithought this was just det doesnt = 0,,confused as to how im supposed to do this part when k doesnt = 5 either,,,,,,help pls
