Răspuns:
= [tex]\frac{x}{y}[/tex] notez asa sa fie mai simplu
x= 9⁹-8*9⁸-8*9⁷= (3²)⁹-2*4*(3²)⁸-2*4*(3²)⁷=3¹⁸-2*4*3¹⁶- 2*4*3¹⁴= 3¹⁴( 3⁴- 8*3²-8)= 3¹⁴*(9*9-8*9-8)=3¹⁴*(81-72-8)=3¹⁴*1= 3¹⁴
y= 3¹⁸- 2*3¹⁷-2*3¹⁶= 3¹⁶(3²-2*3¹- 2)=3¹⁶(9-6-2)= 3¹⁶*1= 3¹⁶=3¹⁴*3²=3¹⁴*9
[tex]\frac{x}{y}[/tex]= [tex]\frac{3^{14} }{3^{14}*9 }[/tex]= [tex]\frac{1}{9}[/tex]
rasp 1/9 c)
