Question

If 1/u=1/f-1/v is the formula Express f as the subject of the formula​

Answer 1

`f = (1)/((1)/(u)+ (1)/(v) )\\`

Explanation:

`1/u=1/f-1/v\\(1)/(f) = (1)/(u) +(1)/(v)\\Divide- both- sides- by; 1\\(1)/(f) / (1)/(1) = ( (1)/(u) +(1)/(v)) / (1)/(1)\\\\f = (1)/((1)/(u)+ (1)/(v) )`