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Sum of n Terms

Find No. Of t...

Question

Find No. Of terms of Exp ${(1 + 2 x + x^{2})}^{20}$

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Solution

$(1 + 2 x + x^{2})^{20}$
$(x^{2} + 1)^{20}$
$(x + 1)^{40}$
$∴$ No of terom $= 40 + 1 = 41$

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