Math Goodies is a free math help portal for students, teachers, and parents.
|
Interactive Math Goodies Software

testing left nav
Math Forums @ Math Goodies
Home | Profile | Active Topics | Members | Search | FAQ
 All Forums  Homework Help Forums  Pre-Calculus and Calculus  Need help on these problems! New Topic  Reply to Topic  Printer Friendly
Author  Topic

aws41109
New Member

USA
1 Posts

 Posted - 02/11/2012 :  23:23:22 I really cannot start to figure these problems out!If ∫ (x2-2x+2) dx [0,6] is approximated by three inscribed rectangles of equal width on the x-axis, then what is the approximation?Let f(t)= 1/t for t>0. For what value of t is f’(t) equal to the average rate of change of f on the closed interval [a,b]?(A) -√(ab) (B) √(ab) (C) -1/√(ab) (D) 1/√(ab) (E) √((1/2)(1/b-1/a))What is: lim (x->b) (b-x)/(√(x) - √(b))t: 1 3 6 10 15f(t) 2 3 4 2 -1The function f is continuous on the closed interval [1,15] and has the values shown on the table above. Let g(x) = ∫f(t) dt [1,x]. Using the intervals [1,3], [3,6], [6,10], [10,15], what is the approximation of g(15) – g(1) obtained from a left Riemann Sum?

royhaas
Moderator

USA
3059 Posts

 Posted - 02/13/2012 :  08:57:07 Please read the posting rules and show some work.
Topic
 New Topic  Reply to Topic  Printer Friendly Jump To: Select Forum New Visitor Forum       Testing Forum Homework Help Forums       Basic Math and Pre-Algebra       Algebra       Geometry and Trigonometry       Pre-Calculus and Calculus       Probability and Statistics       Standardized Test Preparation Help       Miscellaneous Math Topics Educator Forum       Teacher Talk Parent Forum       Parent's Place  -------------------- Home Active Topics Frequently Asked Questions Member Information Search Page
 Math Forums @ Math Goodies © 2000-2004 Snitz Communications
testing footer