Question

Aflavaloarea lui a:
a×5×2×a=a×a×a;...;a×b×7×8×a=a×b×a×a si regula de al :221,300,331,600,441,1200,......,.......,........,........, ;

Answer 1

a*5*2*a = a*a*a => a*a*10 = a*a*a |:a*a => 10 = a
a*b*7*8*a = a*b*a*a | :a*a => b*7*8 = a*b |:b => a=7*8 = 56

221 ; 300 ; 331 ; 600 ; 441 ; 1200
observam ca 441 = 331 + 110 si 331 = 221 + 110
si
1200 = 2*600 iar 600 = 2*300
deci urm. termeni vor fi 441 + 110 = 551 si 2*1200 = 2400, apoi 551 + 110 = 661 si 2*2400 = 4800 si tot asa..