Write the number of terms in the expansion of ${(1 - 3 x + 3 x^{2} - x^{3})}^{8}$ .

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Solution

$The given expression is (1 - 3 x + 3 x^{2} - x^{3})^{8} . It can be written as [(1 - x)^{3}]^{8} i . e . (1 - x)^{24} Hence, the number of terms is (24 + 1) i . e . 25$

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