B,7

2 (b) Show that the function y = 2 y = ex erf(x) 2 y' = 2xex erf(x) + 2 ex erf(x) satisfies the differential equation y' erf '(x) 2 by part one of the fundamental theorem of calculus [-/5 Points] 7. DETAILS dx = SCALCCC5 5.5.020.EP. Consider the following integral. u du 1 Find a substitution to rewrite the integrand as - dx. 2 x du Evaluate the given integral. (Use C for the constant of integration.)