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XoY=4xy-4x-4y+5
Calculati: XoX=5
o = compus


Răspuns :

x°y=4(x-1) (y-1)+1

5°5=4(5-1)(5-1)+1=4³+1=64+1=65
sau la rand, in prima forma
4*5*5-4*4-4*5+5=
4*25-20-20+5=100-40+5=65