A. If the focal length of the convex lens is supposed to be 5 cm, and if the image is formed 7 cm from the lens, find the distance, p, from the lens to the object. (It’s not necessary to simplify your answer.)

Question

Equation: 1/p + 1/q = 1/f

bobpursley · Answer

1/5=1/7+1/p 7p=5p+35 can you take it from here? Wondering where you got the idea this is calculus.this is hardly prealgebra.

Mary · Answer

Yeah, its on my AP Calculus homework actually, in reality its just a small part of a very very long question, I just wanted to make sure I did my work right because the first step is the most important in this problem because if I get part A wrong then I will end up getting all the rest wrong as well.