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Va rog ex 46 tot. Multumesc!

Va Rog Ex 46 Tot Multumesc class=

Răspuns :

[tex]\it1)\ a)\ A_7A_8=1;\ \ A_1A_5=4;\ \ A_1A_8=7;\ \ A_5A_8=3\\ \\ b)\ A_pA_q=p-q\\ \\ \\ 2)\ a)\ A_7A_8=7;\ \ A_1A_5=10;\ \ A_1A_8=28;\ \ A_5A_8=18\\ \\ b)\ A_pA_q=p+p+1+p+2+\ ...\ +p+q-1[/tex]