1.

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Answer»

heya!!

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your answer is option (3)

we have mirror formula as

1/F = 1/v. + 1/u

on differentiating both sides we get

-df/f^2. = -dv/v^2. - du/u^2

in terms of % error it is written as,

df/f × 100. = f(dv/v^2. + du/u^2)

HOPE it helps!!

#PhoeniX



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