4.
观察下列一组式的变形过程,然后回答问题:
例\(1\):\( \dfrac {1}{ \sqrt {2}+1}= \dfrac { \sqrt {2}-1}{( \sqrt {2}+1)( \sqrt {2}-1)}= \dfrac { \sqrt {2}-1}{( \sqrt {2})^{2}-1}= \dfrac { \sqrt {2}-1}{1}= \sqrt {2}-1\).
例\(2\):\( \dfrac {1}{ \sqrt {3}+ \sqrt {2}}= \sqrt {3}- \sqrt {2}\),\( \dfrac {1}{ \sqrt {4}+ \sqrt {3}}= \sqrt {4}- \sqrt {3}\),\( \dfrac {1}{ \sqrt {5}+ \sqrt {4}}= \sqrt {5}- \sqrt {4}\)
利用以上结论解答以下问题:
\((1) \dfrac {1}{ \sqrt {6}+ \sqrt {5}}=\) ______
\((2)\)应用上面的结论,求下列式子的值.
\( \dfrac {1}{ \sqrt {2}+1}+ \dfrac {1}{ \sqrt {3}+ \sqrt {2}}+ \dfrac {1}{ \sqrt {4}+ \sqrt {5}}+…+ \dfrac {1}{ \sqrt {100}+ \sqrt {99}}\)
\((3)\)拓展提高,求下列式子的值.
\( \dfrac {1}{1+ \sqrt {3}}+ \dfrac {1}{ \sqrt {3}+ \sqrt {5}}+ \dfrac {1}{ \sqrt {5}+ \sqrt {7}}+…+ \dfrac {1}{ \sqrt {2015}+ \sqrt {2017}}\).