Numarul de termeni - (ultimul-primul)/ratie+1, Suma de progresie aritmetica - n(a1+an)/2, Suma de progresie geometrica - b1(qn-1)/q-1, Ratie progresie aritmetica - an-an-1, Ratie progresie geometrica - bn/bn-1, Termenul general progresie aritmetica - an=a1+(n-1)r, Termenul general progresie geometrica - bn=b1*qn-1 , ∆= - b2-4*a*c, x1,2= - (-b∓√∆)/2*a, x1/2= - radical(x), logaa= - 1, loga1= - 0, logab+logac= - loga(b*c), logab-logac= - loga(b/c), logabn= - n*logab, loganb= - (1/n)*logab, conditii de existenta radicali - ceea ce e sub radical >0 (pt ordin par), conditii de existenta logab - a>0; a!=1; b>0, a-1 - 1/a, ax * ay - ax+y, ax : ay - ax-y, (ax)y - ax*y,

Formule 10

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