A candle is placed 22 cm from a converging mirror. An upright image is produced and is located 53 cm behind the mirror. What is the magnification?

2.41

Step-by-step explanation:

Magnifcation = Image distance/object distance

Given;

Image distance = -53cm

Object distance = 22cm

Substitute

Magnification = 53/22

Magnification = 2.41

Note that the negative sign is not used in calculating magnification

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb