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• a rectangular game board is composed of identical squares arranged in a rectangular array of r rowsa:r^2-rb:r^2-1c:r^2d：r^2+1e:r^2+ra rectangular game board is composed of identical squares arranged in a rectangular array of r rows and r+1columns.the r rows are numbered from 1 through r,and the r+1 columns are numbered from r through r+1，if 人》10，which of the following represents the number of squares on the board that are neither in the 4th row nor in
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