Question

Cine ma poate ajuta la ex 11 si 12?

Answer 1

11.
le scriem in baza 10
n=(10a+4)(10a+6)+1=100a²+40a+60a+24+1=100a²+100a+25=(10a+5)²
deci patrat perfect


12
B={21;1,04;2,(6); 3/8}
21²=441
1,04²=1,0816
2,(6)²=[(26-2)/9]²=(24/9)²=(8/3)²=64/9=7,(1)
3/8=9/64
A={441;1,0816;7,(1); 9/64}