For problems 7-8, consider the following parametric equation: x = e^-ty = e^2t- 1

\fInterval of Function Convergence ! = 1 - (x - 1) + (x - 1)2 - (x - 1)3 + (x - 1)4 - . . . + (- 1)" (x - 1)"+ . .. 0+x-x+. . .+(-lux+.. -1