List all possible cases of whole numbers m and n for identity (1). more precisely, when m > 0 and n > 0, we already
know that (1) is correct. what are the other possible cases of m and n for which (1) is yet to be verified?

ummm seems that u didnt post the attachement !

answer: x=60

1/8 is left? add a bit more info plz

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be