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Mathematics
Mathematics
Problem
Calculate
∑
k
=
1
10
k
2
−
∑
k
=
1
10
k
\displaystyle\sum_{k=1}^{10} k^{2}-\sum_{k=1}^{10} k
k
=
1
∑
10
k
2
−
k
=
1
∑
10
k
. a) 385 b) 330 c) 275 d) 440
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