Question

Calcuati media aritmetica si media proportionala a numerelor:
a) 2-√5 , 2+√5
b)2/√2 ,2/√3

Answer 1

1. (2-√5+2+√5)/2 = 4/2 = 2 (se simplifica radicalii)
2. 2/√2=√2 (rationalizare)
2/√3 =(2√3)/3
deci:
√2 + (2√3)/3 =(3√2+2√3)/3

avem : ((3√2+2√3)/3)/2 = (3√2+2√3)/3 * 1/2 = (3√2+2√3) / 6