PLEASE HELP! An object is placed at a distance of 18.0 cm to the left of a thin converging lens of focal length -10.0 cm. Where does the image form

Let f(t) be a function on [0, infinity). the laplace transform of f is the function f defined by the integral f(s)equalsintegral from 0 to infinity e superscript negative st baseline f left parenthesis t right parenthesis dt. use this definition to determine the laplace transform of the following function.