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When a string is divided into three segm...

When a string is divided into three segments of length `l_1,l_2` and `l_3` the fundamental frequencies of these three segments are `f_1,f_2` and `f_3` respectively. The original fundamental frequency `f` of the string is

A

`(1)/(v)=(1)/(v_1) + (1)/(v_2) + (1)/(v_3)`

B

`(1)/(sqrt(v))=(1)/(sqrt(v_1)) + (1)/(sqrt(v_2)) + (1)/(sqrt(v_3))`

C

`sqrt(v)=sqrt(v_1) + sqrt(v_2)+sqrt(v_3)`

D

`v=v_1+v_2+v_3`

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The correct Answer is:
A
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