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题型:填空题 题类:常考题 难易度:普通
探索数与式的规律++++++++
12=1= ×1×2×(2+1)
12+22= ×2×3×(4+1)
12+22+32= ×3×4×(6+1)
12+22+32+42= ×4×5×(8+1)…
可以推测12+22+32+…+n2= {#blank#}1{#/blank#}.
= = = =
= = =
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