The year is 1850. You are a member of the working class living in a major Western European city or a city in the United States. Write a letter to your friend who lives in the country and explain that you’re thinking of having a portrait made of yourself. You are considering 2 options, an oil painting or one of the “new” photo processes i.e. daguerreotype and calotype.Weigh all facts you must consider for both options using your friend as a sounding board. Assume your friend knows little to nothing about photography. What are the pro’s and con’s of each? What is involved with each process? What do you decide? Why? Your letter should clearly show you understand the social/ cultural, economic, and technical considerations.2pages.
Obtain the general solution of the following DEs: i. y′′′ + y′′ − 4y′ + 2y = 0 ii. y(4) + 4y(2) = 0 iii. x(x − 2)y′′ + 2(x − 1)y′ − 2y = 0; use y1 = (1 − x) iv. y′′ − 4y = sin2(x) v. y′′ − 4y′ + 3y = x ; use y1 = e3x vi. y′′ + 5y′ + 6y = e2xcos(x) vii. y′′ + y = sec(x) tan(x)
Obtain the general solution of the following DEs: i. y′′′ + y′′ − 4y′ + 2y = 0 ii. y(4) + 4y(2) = 0 iii. x(x − 2)y′′ + 2(x − 1)y′ − 2y = 0; use y1 = (1 − x) iv. y′′ − 4y = sin2(x) v. y′′