Răspunsuri

2014-06-18T09:45:42+03:00
A=8-3√7 +1/2 * (9+6√7+7)=

a=8-3√7 + (16+6√7)/2   aducem la acelasi numitor

a=(16-6√7+16+6√7)/2=

a=(16+16)/2=  32/2=16

ma=(a+b)/2

ma=(16+24)/2= 40/2=20