Consider a concave mirror that has a focal length f. In terms of f, determine the object distances that will produce a magnification of A. -2
B. -3
C. -4

We have that the magnification of each focal length is given respectively as

A) has

B) has

C) has  

From the question we are told that:

Focal Length F

Generally, the equation for Magnification is mathematically given by

Therefore

For A

Therefore

Therefore

For B

Therefore

Where

Therefore

For C

Therefore

Therefore

Therefore

Conclusion

From the calculations above we can rightly say that the magnifications of the values above are

A has

B has

C has  

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