use sigma notation to write the maclaurin series for the function ln(1+x)

Answer 1

Since the series is

x - x^2/2 + x^3/3 - x^4/4 + ...

That would be

∞
∑ (-1)^(k-1) x^k/k
k=1

Answer 2

Use sigma notation to write the Maclaurin series for the
function e^-x