[tex]1) \frac{22^{2011}}{22^{2010}}+3^4-103=22+81-103=103-103=0 \\
2) a(b+c)-ad=a*[b+c-d]= 5*9=45 \\
3) \frac{42}{56} = \frac{3}{4}[/tex]
fractia se simplifica prin 14, deci ea este ireductibila
[tex]4) 12 cm[/tex]
deoarece o latura e diametru cercului.Deci d=2R=12 cm. Si stim ca triunghiul echilateral are toate laturile egale.
[tex]5) V= \frac{\pi*R^2*h}{3}= \frac{A_{bazei}*h}{3}= \frac{25*\pi cm^2*12 cm}{3} =300\pi cm^3[/tex]
[tex]6) m_{clasei}= \frac{4*0+5*2+6*3+7*5+8*6+9*5+10*4}{2+3+5+6+5+4}= \frac{0+10+18+35+48+45+40}{25}= \\ = \frac{196}{25}=7,84 [/tex]
