Question

Ma ajuta si pe mine cineva ?Va  rog!!!! 

Answer 1

[tex] \frac{a_1+a_2+a_3+a_4+a_5+a_6}{6}=25=>a_1+a_2+.a_3+a_4+a_5+a_6=150 \\ \frac{a_7+a_8+a_9+a_{10}}{4}= 15=>a_7+a_8+a_9+a_{10}=60 \\ ----------------------------(+) \\ a_1+a_2+a_3+.....+a_{10}=150+60=210 \\ ma_{a_1,a_2....a_{10}}= \frac{a_1+a_2+a_3+.....+a_{10}}{10}= \frac{210}{10}=21 \\ \\ \\ \frac{abba+aba+aa+bb}{4}=1375=>abba+aba+aa+bb=5500 \\ 1000a+100b+10b+a+100a+10b+a+10a+a+10b+b= 550 \\ 1113a+131b=5500 \\ Aici~nu~stiu,~m-am~blocat.~O~sa~stau~sa~ma~gandesc,~poate~o~fac...[/tex]