观察下列各组数4×2-3×1=5 5×3-4×2=7 6×4-5×3=9 7×5-6×4=11 你能从中的道什么结论?请
1个回答
(n+3)(n+1)-(n+2)n=2n+3
证明:(n+3)(n+1)-(n+2)n=n^2+4n+3-(n^2+2n)=2n+3
相关问题
观察下列式子:1×4+2=6=2×3,2×5+2=12=3×4,3×6+2=20=4×5,4×7+2=30=5×6…,请
观察下列式子:1×4+2=6=2×3,2×5+2=12=3×4,3×6+2=20=4×5,4×7+2=30=5×6…,请
观察下列各式:①1×2×3×4+1 ②2×3×4×5+4 ③3×4×5×6+9
计算:1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______.
计算:1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______.
计算:1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______.
计算:1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______.
如何计算下题: 1×2×3+2×3×4+3×4×5+4×5×6+5×6×7+6×7×8+7×8×9+……+n×(n+1)
1×2+2×3+3×4+4×5+5×6+6×7+.10×11等于多少
观察,分析,猜想:1×2×3×4+1=52;2×3×4×5+1=112;3×4×5×6+1=192;4×5×6×7+1=