Răspuns :
a)2³+2²+2¹+2⁰= 2(2²+2+1)+2⁰= 2*7+1=15
b) 3⁹-27³=3⁹- (3³)3= 3⁹ -3⁹=3⁹(1-1)= 3⁹ *0=0
b) 3⁹-27³=3⁹- (3³)3= 3⁹ -3⁹=3⁹(1-1)= 3⁹ *0=0
2³ + 2² + 2¹ + 2⁰ = 8 + 4 + 2 + 1 = 15
3⁹ - 27³ = 3⁹ - (3³)³ = 3⁹ - 3⁹ = 0
3⁹ - 27³ = 3⁹ - (3³)³ = 3⁹ - 3⁹ = 0