aws41109
New Member
USA
1 Posts 
Posted  02/11/2012 : 23:23:22

I really cannot start to figure these problems out!
If ∫ (x22x+2) dx [0,6] is approximated by three inscribed rectangles of equal width on the xaxis, 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/b1/a))
What is: lim (x>b) (bx)/(√(x)  √(b))
t: 1 3 6 10 15 f(t) 2 3 4 2 1
The 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?


