43. If 3-5x 3-5y 3-5% X Y Z 0, the ...
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43. If 3-5x 3-5y 3-5% X Y Z 0, the value of 1 1 1 x + y + is (2)5 (1)-5 (3) 2 (4) 3

11th - 12th Class
Maths
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43. ( (2) frac{3-5 x}{x}+frac{3-5 y}{y}+frac{3-5 z}{z}=0 ) ( Rightarrow frac{3}{x}-frac{5 x}{x}+frac{3}{y}-frac{5 y}{y}+frac{3}{z}-frac{5 z}{z}=0 ) ( Rightarrow frac{3}{x}+frac{3}{y}+frac{3}{z}-15=0 ) ( Rightarrow 3left(frac{1}{x}+frac{1}{y}+frac{1}{z}right)=15 ) ( Rightarrow frac{1}{x}+frac{1}{y}+frac{1}{z}=5 )
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