frac{1}{2})^x$$ 1/$8^{x+1}+8(\frac{1}{2})^{3x}+3.2^{x+3}=125-24.(\frac{1}{2})^x$ 2/$4^{x+1}-6^x-18.9^x=0$ 3/$(\sqrt{7-\sqrt{48}})^x+(\sqrt{7+\sqrt{48}})^x=14$ 4/$3^x.8^{\frac{x}{x+2}}=6$ 5/$(4-\sqrt{15})^x+(4+\sqrt{15})^x