Multiple choice general knowledge math & puzzles Series expansion of exp(x) is x-(x^3)/3!+(x^5/5!)-.... 1+x+(x^2)/2!+(x^3)/3!+..... 1+(x^2)/2!+(x^4)/4!+... 1+x-(x^2)+(x^3)+.... Reveal answer Fill a bubble to check yourself B Correct answer Explanation The exponential function exp(x) or e^x is represented by the power series 1 + x + x^2/2! + x^3/3! + .... This series includes all powers of x with their respective factorials. Other options represent sin(x), cos(x), or geometric series.