Practicing Success
Solve the system of equations in x, y, and z satisfying the following equations: $x+[y] + \{z\} = 3.1$ $\{x\} +y+[z] = 4.3$ $[x]+ \{y\} +z = 5.4$ (where [.] denotes the greatest integer function and {.} denotes the fractional part function.) |
$x = 1, y = 0.3, z = 1$ $x = 2, y = 1, z = 3.1$ $x = 2, y = 1.3, z = 3.1$ $x = 1.2, y = 1, z = 3.1$ |
$x = 2, y = 1.3, z = 3.1$ |
Adding all the three equations, we get $2(x + y + z) = 12.8$ or $x + y + z = 6.4$ ...... (1) Adding the first two equations, we get $x+y+z+ [y] + \{x\} = 7.4$ .......(2) Adding the second and third equations, we get $x+y+z+ [z] + \{y\} = 9.7$ ......(3) Adding the first and third equations, we get $x+y+z+ [x] + \{z\} = 8.5$ ....(4) From (1) and (2), $[y] + \{x\} = 1$. From (1) and (3), $[z] + \{y\} = 3.3$. From (1) and (4), $[x] + \{z\} = 2.1$. So, $[x] = 2, [y]= 1, [z] = 3,$ $\{x\} = 0, \{y\} = 0.3$, and $\{z\} = 0.1$ $∴x = 2, y = 1.3, z = 3.1$ |