Chapter 1.1, Problem 53E

3. If the total revenue received from the sale of x items is given by R(x)=30ln (2x+1), While the total cost to produce x items is C(x)=✗, find the following. a) The marginal revenue b) The profit function P(x) (Hint: P(x)=R(x)-C(x)} c) The marginal profit when x=20 d) Interpret the results of part c).

2. The sales of a new personal computer (in thousands) are given by S(t)=100-90€-04: Where t represents time in years. Find and interpret the rate of change of sales at each time. a) After 1 year b) After 5 years c) What is happening to the rate of change of sales as time goes on? d) Does the rate of change of sales ever equal zero?

2. Find the equation of the line tangent to the graph of f(x)=ln(x²+5) at the point (-1, In 6). Do not approximate numbers.

please solve, thank you

Evaluate the definite integral using the given integration limits and the limits obtained by trigonometric substitution. 14 x² dx 249 (a) the given integration limits (b) the limits obtained by trigonometric substitution

Assignment #1 Q1: Test the following series for convergence. Specify the test you use: 1 n+5 (-1)n a) Σn=o √n²+1 b) Σn=1 n√n+3 c) Σn=1 (2n+1)3 3n 1 d) Σn=1 3n-1 e) Σn=1 4+4n