Zadanie 1
a)
\frac{\sqrt5*125^{\frac{2}{3}}}{25^{\frac{1}{2}}}=\frac{\sqrt5*(5^3)^{\frac{2}{3}}}{\sqrt{25}}=\frac{\sqrt5*5^2}{5}=\frac{\sqrt5*\not25^5}{\not5^1}=5\sqrt5
b)
\sqrt8+\sqrt{32}-\sqrt{50}+\sqrt{98}=\sqrt{4*2}+\sqrt{16*2}-\sqrt{25*2}+\sqrt{49*2}=
=2\sqrt2+4\sqrt2-5\sqrt2+7\sqrt2=8\sqrt2
Zadanie 3
log_38 =a oraz log_32=b.
A. b=3a B. b=a/3 C. b=2/3a D.b=3/2 a
log_38=a
log_32^3=a
3log_32=a
3b=a|:3
b=\frac{a}{3} odpowiedź B