Răspunsuri

2014-09-12T00:56:50+03:00
A)a/b= 3/8

a/3=b/8=k

a=3k
b=8k

p% din a=b

p/100 *3k=8k

p/100=8k/3k

p=100*8/3

p=800/3

p=266,6%

b)(a²+b²)/2ab= [(3k)²+(8k)²]/2*3k*8k=

=(9k²+64k²)/48k²=

=73k²/48k²=

=73/48