1.

यदि `n_(1),n_(2)` व `n_(3)` एक डोरी के तीन भागो की मूल आवृत्तियाँ है तब डोरी की वास्तविक मूल आवृत्ति हैA. `(1)/(n)=(1)/(n_(1))+(1)/(n_(2))+(1)/(n_(3))`B. `(1)/(sqrt(n))=(1)/(sqrt(n_(1)))+(1)/(sqrt(n_(2)))+(1)/(sqrt(n_(3)))`C. `sqrt(n)=sqrt(n_(1))+sqrt(n_(2))+sqrt(n_(3))`D. `n=n_(1)+n_(2)+n_(3)`

Answer» Correct Answer - A
अतः `nprop(1)/(l)` तथा `l=l_(1)+l_(2)+l_(3)`
`(1)/(n)=(1)/(n_(1))+(1)/(n_(2))+(1)/(n_(3))`


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