हल करना 1/f = 1/u + 1/v | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$\frac{1}{f}=\frac{1}{u}+\frac{1}{v}$$