Question

P is a point in the exterior of angleXYZ as shown in the figure. PX, PY and PZ are joined,

a. Is XY+YZ > ZX? Why?

b. Is PX + PY > XY? Why?

c Is PX+ PZ> XZ? Why?

d. Is PY+ PZ>YZ? Why?

e. Is 2(PX + PY + PZ) > (XY+YZ+ZX)? How?​

Answer 1

Answer:

ANSWER

px+y+z=1

x+py+z=p

x+y+pz=p

2

you can use Row Echelon from

But here a trick is easy to see

put p=−2

−2x+y+z=1

x−2y+z=−2

x+y−2z=4 Add

⇒0=3 Not possible

∴ For P=−2: No solution