Define the double factorial of n, denoted , as follows: ={1⋅3⋅5(n−2)⋅nif n is odd 2⋅4⋅6(n−2)⋅nif n is even and (−1)==1. find the radius of convergence for the given power series. ∑n=1[infinity]9n⋅n! ⋅(5n+4)! ⋅(2n)⋅[(n+6)! ]5⋅(4n−4)(8x−2)n

The table below shows the approximate height of an object x seconds after the object was dropped. the function h(x)= -16x^2 +100 models the data in the table. for which value of x would this model make it the least sense to use? a. -2.75 b. 0.25 c. 1.75 d. 2.25