Question

Imi spune cineva cum se rezolva ?
Calculaţi media aritmetică a numerelor a şi b, ştiind că a=$\frac{5}{3}- \frac{3}{7}$ si b=$\frac{1}{3}+ \frac{3}{7}$

Answer 1

a=$\frac{5}{3}$-$\frac{3}{7}$=$\frac{35-9}{21}$=$\frac{26}{21}$
b=$\frac{1}{3}$+$\frac{3}{7}$=$\frac{7+9}{21}$=$\frac{16}{21}$
ma=$\frac{a+b}{2}$=$\frac{26}{21}+ \frac{16}{21}$ supra 2=$\frac{26+16}{21}$ supra 2=$\frac{42}{21}$ supra 2=$\frac{42}{21}$ x $\frac{1}{2}$=$\frac{42}{42}$=1