Simplify the following union (-∞,4]n[0,15)

Hey Steve what's up

I would like to correct you, that it's intersection not union union had u typed symbol whereas intersection had inverse u typed structure.

Hence here the intersection is {1,2,3,4}

Thank you

Good day Steve

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap