We combine two lenses, one is convex and other is concave having focal lengths

Question

We combine two lenses, one is convex and other is concave having focal lengths /, and f2 and their combined focal length is F

Options:

A . f1 > f2

B . f1 = f2

C . f1 < f2.

D . f1 ≤ f2

Answer: Option A

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