2009 · Q69
If ax = by = cz and abc = 1, then what is xy + yz + zx equal
Elementary MathematicsAlgebra
- Axyz
- Bx + y + z
- C0
- D1
Explanation
a=b^... gives 1/x+1/y+1/z=0, so xy+yz+zx=0.
If ax = by = cz and abc = 1, then what is xy + yz + zx equal
Explanation
a=b^... gives 1/x+1/y+1/z=0, so xy+yz+zx=0.