Odpowiedź :
1) (5/9)²·(3/10)²=(5/9·3/10)²=(1/6)²=1/36
2) (9^7·27^5)/(81)^7=[(3²)^7·(3³)^5]/(3^4)^7=(3^14·3^15)/3^28=3^29/3^28=3
3) (25²·4^7)/(2^9·5^4)=[(5²)²·(2²)^7]/(2^9·5^4)=(5^4·2^14)/(1^9·5^4)=2^14/2^9=2^5=32
Odpowiedź:
[tex]1)\ \ (\frac{5}{9})^2\cdot(\frac{3}{10})^2=(\frac{\not5^1}{\not9_{3}}\cdot\frac{\not3^1}{\not10_{2}})^2=(\frac{1}{6})^2=\frac{1}{36}\\\\\\2)\ \ \dfrac{9^7\cdot27^5}{81^7}=\dfrac{(3^2)^7\cdot(3^3)^5}{(3^4)^7}=\dfrac{3^1^4\cdot3^1^5}{3^2^8}=\dfrac{3^2^9}{3^2^8}=3^{29-28}=3^1=3\\\\\\3)\ \ \dfrac{25^2\cdot4^7}{2^9\cdot5^4}=\dfrac{(5^2)^2\cdot(2^2)^7}{2^9\cdot5^4}=\dfrac{\not5^4\cdot2^1^4}{2^9\cdot\not5^4}=2^{14-9}=2^5=32[/tex]