Solve the initial value problem y''+7y'-18y=0,y(0) =1,y'(0) =-1. Enter your answer as a symbolic function of x, as in these examples. Submit Problem for Grading a) y(x) = e⁻⁶ˣ(1 + eˣ) b) y(x) = e⁻⁶ˣ(1 - eˣ) c) y(x) = e⁻⁶ˣ(1 + e⁻ˣ) d) y(x) = e⁻⁶ˣ(1 - e⁻ˣ)
