punctul a)
a=11*2^78
11a=11*11*2^78=11² * (2^39)²= (11*2^39)²= numar ², adica patrat perfect
punctulc)
a=2^78(16-4-1)=11*2^78
b=3^52(27-9-1)=17*3^52
11<17(1)
2^78=2^(6*13)=(2^6)^13=64^13
3^52=3^(4*13)=(3^4)^13=81^13>64^13
deci
2^78<3^52 (2)
din (1) si (2)⇒a=11*2^78<17*3^52=b,
adica
a<b
