观察下列运算并填空:
1×2×3×4+1=24+1=25=52;???2×3×4×5+1=120+1=121=112
3×4×5×6+1=360+1=361=192…
(1)4×5×6×7+1=______+1=______=______2
(2)试猜想(n+1)(n+2)(n+3)(n+4)+1=______2.
网友回答
解:(1)4×5×6×7+1=840+1=841=292;
(2)1×2×3×4+1=24+1=25=(1×4+1)2=52;
2×3×4×5+1=120+1=121=(2×5+1)2=112,
3×4×5×6+1=360+1=361=(3×6+1)2=192,
…,
(n+1)(n+2)(n+3)(n+4)+1=[(n+1)(n+4)+1]2=(n2+5n+5)2.
故