Question

Ex-6(a,b)
Ex-7(a,b)
Va rog ajutor urgent!!!!!

Answer 1

6. a)   

[tex] \frac{3^{-4} }{3^{-7} } =3^3=27 [/tex]

b) 

$5^{-11} *5^9= 5^{-2} = \frac{1}{5^2} = \frac{1}{25}$


7. a) $2a^{-3} *5a^5=10a^{-3+5} =10a^2$

b) [tex] \frac{7x^{-3} }{28x^{-4} }= \frac{x}{4} [/tex]

- simplifici x^-2 cu x^-4 iti ramane 7 supra 28 = x/4