Define n! 1.2.3(n - 1)n. calling it n,factorial. Prove that for every n E Z+ where e-2.71.... s the natural logarithm base. Use the telescope method discussed in vLec5_29. You can also preview the method in the oth lecture notes posted on Canvas answer starts here Define n! 1.2.3(n - 1)n. calling it n,factorial. Prove that for every n E Z+ where e-2.71.... s the natural logarithm base. Use the telescope method discussed in vLec5_29. You can also preview the method in the oth lecture notes posted on Canvas answer starts here