单词 | sum |
释义 | sum [sǝm] MATHEMATICS 1. The addition of numbers or mathematical objects in context. 2. The sum of an infinite series is the limit of the sequence consisting of all partial sums of the series. 3. The sum A + B of two matrices A and B, with the same number of rows and columns, is the matrix whose element cij in row i and column j is the sum of corresponding elements aij in A and bij in B. |
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