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In this question, AB means A raised to power B. If x*y2*z < 0, then which one of the following statements must also be true?
I. xz < 0
II. z < 0
III. xyz < 0
1) I and II
2) III only
3) none of the above
4) I only
Read Solution (Total 8)
-
- x*y^2*z < 0
y^2 is always +ve , y may be +ve or -ve
=> xz < 0
if x +ve then z -ve
if x -ve then z +ve
4) I only
- 10 years agoHelpfull: Yes(28) No(0)
- option 4 is correct.
- 10 years agoHelpfull: Yes(0) No(0)
- y2 will be +ve so xz has to be -ve
may be x - 10 years agoHelpfull: Yes(0) No(1)
- Actually option a)
Bcos
Its clear z0
There fore it is option a) - 10 years agoHelpfull: Yes(0) No(0)
- option 1
y^2 is always >0
so xz mustbe - 9 years agoHelpfull: Yes(0) No(0)
- 1 only
xz - 9 years agoHelpfull: Yes(0) No(0)
- here y2 will always be positive so
i) if xz - 9 years agoHelpfull: Yes(0) No(0)
- xz
- 9 years agoHelpfull: Yes(0) No(0)
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