09-11-2019
Physics

contestada

Physics/Math
[tex] \frac{1}{f } = \frac{1}{p} + \frac{1}{l} [/tex]
How do I derive "f"?
Pleaseee help me

Respuesta :

MathPhys MathPhys

09-11-2019

Answer:

f = pl / (l + p)

Explanation:

1/f = 1/p + 1/l

Find the common denominator of the right hand side.

1/f = l/(pl) + p/(pl)

Add:

1/f = (l + p) / (pl)

Take the inverse of both sides:

f = pl / (l + p)

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