Answer:
f = 1 m
Explanation:
The magnification of the lens is given by the formula:

where,
M = Magnification = 4
q = image distance = 5 m
p = object distance = ?
Therefore,

Now using thin lens formula:

<u>f = 1 m</u>
<h3>In macroeconomic theory,liquidity preference is the demand for money, considered as liquidity.</h3>
<span>A: Al + FeO → Al2O3 + Fe
Hope it helps!
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