No, the equation in the image does not involve multiplication directly. Instead, it uses the **lens formula**, which involves reciprocals of distances:

\[
\frac{1}{f} = \frac{1}{u} + \frac{1}{v}
\]

Here:
- \( f \) is the focal length of the lens,
- \( u \) is the object distance,
- \( v \) is the image distance.

The terms are added as reciprocals (fractions). This is a typical formula used in optics for lenses and mirrors, specifically involving **addition** of these reciprocals, not multiplication.

Would you like more clarification or details on this?

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Here are some related questions to deepen your understanding:

1. How can you derive the lens formula using the geometry of lenses?
2. Why is the lens formula used for both concave and convex lenses?
3. What are some practical applications of this lens equation in optics?
4. Can you calculate the magnification of the lens using the object and image distances?
5. How does the sign convention change if the lens is convex instead of concave?

**Tip:** When working with lenses or mirrors, ensure you apply the correct sign conventions for distances based on the type of optical system.

Explore the lens formula in optics and its practical application in calculating focal length and image formation. This problem involves the lens formula which uses reciprocals of distances. Suitable for advanced high school students and anyone interested in optics.

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