1.The coefficient of t3t^{3}t3 in the expansion of (1−t3)(1+t)−3\left(1 - t^{3}\right)\left(1 + t\right)^{-3}(1−t3)(1+t)−3 is:a.101010b.141414c.151515d.121212Login to continueOnly logged in users canattempt or see the solution.
