Mathematics, 21.09.2021 21:50, wazzuphottie1999

The contractor that was hired to lay the tile in the cafeteria is trying to generalize a way to calculate the number of colored tiles needed for a checkerboard border surrounding

a square of tiles with any dimensions. To represent this general situation, the contractor

started sketching the square below.

Find an expression for the number of colored border tiles needed for any Nx N

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