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In the expansion of (2x−a)6, the coefficient of x4 is 380.
Find the possible value(s) of a.
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In the expansion of (2x3+bx1)8, the coefficient of x12 is 28.
Find the value of b.
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Find the number of distinct ways the letters in the word MISSISSIPPI can be arranged.
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Expand (2x−3)4 in descending powers of x.
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