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1. If ax=b, by=c and cz=a, then the value of xyz is
- A. 2
- B. 2
- C. 2
- D. 2
Answer: Option B
Explanation:
From ax = b, we get x =b/a -------------------------- (i)
From by = c, we get y =c/b ---------------------------(ii)
From cz = a, we get z = c/a ---------------------------(iii)
Multiplying the left hand sides and right hand sides of (i), (ii) and (iii) we get
xyz = (b/a) x (c/b) x (c/a)
When we simplify, we find that xyz=1.
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