1.The coefficient of x20x^{20}x20 in the expansion of (1+x2)40⋅(x2+2+1x2)−5(1 + x^2)^{40} \cdot (x^2 + 2 + \frac{1}{x^2})^{-5}(1+x2)40⋅(x2+2+x21)−5 isa.30C10{}^{30}C_{10}30C10b.30C25{}^{30}C_{25}30C25c.1d.None of theseLogin to continueOnly logged in users canattempt or see the solution.
