Question

Make a formula for the statement:"The reciprocal of focal length f is equal to the sum of reciprocals of the object distance u and the image distance v."

Answer 1

Object distance = u
Image distance = v
Reciprocal of object distance = `(1)/"u"`

Reciprocal of Image distance = `(1)/"v"`

sum of reciprocals = `(1)/"u" + (1)/"v"`

Reciprocal of focal length = `(1)/"f"`

As per the data: `(1)/"f" = (1)/"u" + (1)/"v"`.