Let denote greatest integer less than or equal to . If for
\[
\in \mathbb{N},\left(1-x+x^{3}\r.... VIDEO
Let denote greatest integer less than or equal to . If for
\[
\in \mathbb{N},\left(1-x+x^{3}\right)^{n}=\sum_{j=0}^{3 n} a_{j} x^{j} \text {, then } \sum_{j=0}^{\left[\frac{3 n}{2}\right]} a_{2 j}+4 \sum_{j=0}^{\left[\frac{3 n-1}{2}\right]} a_{2 j}+1
\]
is equal to:
(a) 2
(b)
(c) 1
(d) 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live
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