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B
496
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C
506
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D
528
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Solution
The correct option is D476 In (1+x2−x3)8 There are only two possible ways of x10 Those are (x2)5(13)(−x3)0 and (x2)2(−x3)2)14 Hence the corresponding coefficients will be 8!5!(3!) and 8!2!(2!)4! Thus the coefficient of x10 in the above expression is 8!5!(3!)+8!2!(2!)4! =56+420 =476