Desfacem in felul urmator:
[tex] \frac{2 ^{90} - 3 ^{60} + 3 ^{60} - 4 ^{40}}{1-2^{10}}:2^{80}= \frac{2 ^{90} - 4 ^{40}}{1-2^{10}}:2^{80}
= \frac{2^{90}-2^{80}}{1-2^{10}} * \frac{1}{2^{80}} = \frac{2^{90}-2^{80}}{2^{80}-2^{90}} = -1 [/tex]
Sper ca te-am ajutat :>.
