Question

( 36;40 ) =
[ 36;40 ] =

Answer 1

(36,40)= interval deschis=37,38,39
[36;40]=interval închis=36,37,38,39,40

Bafta!!

Answer 2

$\it 36=2^2\cdot3^2\\ \\ 40=2^3\cdot5\\ \rule{70}{0.4}\\(36,\ 40)=2^2=4\\ \\ \Big[36,\ 40\Big]=2^3\cdot3^2\cdot5=8\cdot9\cdot5=360$