Determine the first three terms in the expansion of (x 2x) 0 1 36xy 84x 'y 1x9 18x8y 144x 'y O 19 72xy 168xy2 O 179 9x y 36x x2 ...

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Determine the first three terms in the expansion of (x + 2x) 0 1 +36xy+84x'y] 1x9+18x8y+144x'y O