If C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and D = {numbers divisible by 3 from 1 to 21}, what is C D?
1) {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 18, 21}

2) {3, 6, 9, 12, 15, 18, 21}

3) {3, 6, 9}

4) { }

Question

If C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and D = {numbers divisible by 3 from 1 to 21}, what is C  D? 
1) 	{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 18, 21}
	
2) 	{3, 6, 9, 12, 15, 18, 21}
	
3) 	{3, 6, 9}
	
4) 	{ }

anonymous · Answer

in between of c and d theres an upside down U

lynfran · Answer

what #s frm 1-21 are divisible by 3

lynfran · Answer

??

lynfran · Answer

and the upside down ''U'' means intersection... heres a list of set notations https://www.google.gy/search?q=set+notation+symbols&espv=2&biw=1366&bih=633&tbm=isch&imgil=TgjqAG574LQrxM%253A%253BTdooq26jtbm_aM%253Bhttp%25253A%25252F%25252Fwww.math.csusb.edu%25252Fnotes%25252Fsets%25252Fnode1.html&source=iu&pf=m&fir=TgjqAG574LQrxM%253A%252CTdooq26jtbm_aM%252C_&usg=__iTyChJOCnjvS20lo26trK7gomY8%3D&ved=0CDkQyjdqFQoTCJP4gYan-sYCFQtoPgodP5EOBw&ei=3Jy1VZOaEovQ-QG_oro4#imgrc=TgjqAG574LQrxM%3A&usg=__iTyChJOCnjvS20lo26trK7gomY8%3D