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Asked by pritam | 7th Apr, 2010, 06:46: PM

Expert Answer:

Dear student,

1/p +1/q = 1/f

1/4 + 1/6 = 1/f

f = 2.4

Hope this helps.

topplearning.com

Answered by  | 8th Apr, 2010, 12:16: PM

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