Mathematics

Mathematics



Mathematics

Question 1

x + y + z -4 = 0

2x - 3y + 4z -33 = 0

3x - 2y - 2z -2 = 0

Solution:

Solving with the Cramer's rule = 35

= 70

= -105

= 175

Now X = = 2

Y = = -3

Z = = 5

Question 2

2I1 + 3I2 - 4I3 = 26

I1 - 5I2 - 3I3 = -87

-7I1 +2I2 +6I3 = 12

Solution:

Solving with the Cramer's rule = 129

= 1290

= 1806

= 1161

Now X = = 10

Y = = 14

Z = = 9

Question 3

= - 14i - j - 9k

Question 4

From ...