All you need is first term of Binomial Expansion, (a+b)^n = a^n + n*a^(n-1)*b + ..., so (1+0.01)^200 = 1 + 200*1*0.01 + ... = 2 + ... , hence is larger than 2.
會極限的話 左方是n approach 100, (*) (1+1/n)^n when n approaches positive infinity, it approaches to e given when n =1, (*) =2 given exp(x) is always increasing for all real x, when n is 100, (*) must be greater than 2