If a_b means a^2 + b^2, and a _ b means 2^a + 2^b, find 2_(3 _ 4).

Question

Pay attention to the underscores. I am not sure what they mean, it is just a part of the question and has an different effect depending on which one is used. It is most likely to be +, -, *, /.

Answer 1

It looks like 3 _ 4 in parentheses will go with 2^a + 2^b so

 

2^3 + 2^4 =

 

8 + 16=

 

24

 

now we have 2_24 so use a^2 + b^2

 

2^2 + 24^2

 

= 4 + 576

 

= 580