1)

If 2x=3y=6z, then (1x+1y+1z) is equal to?


A) 0

B) 1

C) 3/2

D) -1/2

Answer:

Option A

Explanation:

Let 2x=3y=6z=k 2=k1x, 3=k1y and 6=k1z. Now 2×3=6 k1x×k1y=k1z k(1x+1y)=k1z 1x+1y=1z 1x+1y+1z=0