Question

Am si eu nevoie de exercitiul 8 si de la 9 punctul 6 va rog frumosss

Answer 1

[tex]ex.8 \\ 1) x^{ \frac{1}{2} }=8 ; x=64 \\ 2) x^{ \frac{1}{3} }=3 ; x=27 \\ 3) x^{ \frac{2}{3} }=4 ; x^{2} =64;x=8 \\ 4) x^{- \frac{3}{2} }=8; x^{-3}=64;x=-4 \\ 5) x^{ \frac{3}{2} }=x \sqrt{2}; x^{3}=2 x^{2} ; x^{2} (x-2)=0; x=2 \\ ex9 \\ 1) 4^{x}=16;x=2 \\ 2) 3^{x} \frac{1}{27};x=-3 \\ 3) 100^{x}=1000; 10^{2x}= 10^{3};x= \frac{3}{2} \\ 4) 8^{x}=16; 2^{3x}= 2^{4} ;x= \frac{4}{3} \\ 5) 8^{x}= \frac{1}{128}; 2^{3x}= 2^{-7};x= -\frac{7}{3} \\ [/tex]