I have read the first homework problem several times but can't understand it.
There's some numbering differences with some of the homework problems.
So, if you've worked the homework problems, you will do the homework quiz handily.
And if you have any questions about the homework problems, again, ask you instructor.
Problem solving, from homework problems to unsolved problems, is certainly an important aspect of mathematics, though definitely not the only one.
And I left the special case of k1 equals k2 to do as a homework problem.