Question

What is the largest integer, \(x\), such that \(x<10,000\) and \(\frac{ \sqrt{x} }{ 5 }\) is an even integer?

Answer 1

turn x into the function ... across the domain

Answer 2

a < x < b

a/k^2 < x/k^2 < b/k^2

sqrt(a/k^2) < sqrt(x/k^2 )< sqrt(b/k^2)

Answer 3

sqrt(x)/5 < 20

sqrt(x) < 100

and sqrt(x) = 5(2k)

10k < 100

k<10

for whatever this is worth