閱讀理觀察下列變形
1×3+1
=
4
=2

2×4+1
=
9
=3
;
3×5+1
=
16
=4
;…
解答下列各題:
(1)填空:
7×9+1
=
(   )
=______;
22×24+1
=
(  )
=______;
31×33+1
=
(   )
=______
(2)請(qǐng)用含n(n為正整數(shù))的等式,反映上面變形規(guī)律.
(1)根據(jù)題意得:
7×9+1
=
64
=8;
22×24+1
=
232
=23;
31×33+1
=
322
=32;
(2)根據(jù)題意得:
n(n+2)+1
=
(n+1)2
=|n+1|=n+1.
故答案為:(1)64;8;232;23;322;32
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