Let

(5.148)		$\displaystyle\widehat{F}(z)$	$\displaystyle\equiv-\frac{jz^{n}}{2}+F(t_{0}(z)),$
(5.149)		$\displaystyle\widehat{G}(z)$	$\displaystyle\equiv-\frac{jz^{n}}{2}+G(u_{0}(z)),$

then for all $\eta\geq 0$, when $z\geq\eta^{\frac{2}{n}}$, $\widehat{F}(z)+\eta\cdot z^{\frac{n}{2}}$ is decreasing and $\widehat{G}(z)-\eta\cdot z^{\frac{n}{2}}$ is increasing.