Identifying definite integrals as limits of sums Consider the following limits of Riemann sums for a function f on [ a , b ] . Identify f and express the limit as a definite integral. 23. lim Δ → 0 ∑ k = 1 n x x * ( ln x k * ) Δ x k on [1, 2]
Identifying definite integrals as limits of sums Consider the following limits of Riemann sums for a function f on [ a , b ] . Identify f and express the limit as a definite integral. 23. lim Δ → 0 ∑ k = 1 n x x * ( ln x k * ) Δ x k on [1, 2]
Solution Summary: The author identifies the function f and expresses its limit as definite integral. The function is xmathrmlnx.
Identifying definite integrals as limits of sumsConsider the following limits of Riemann sums for a function f on [a, b]. Identify f and express the limit as a definite integral.
23.
lim
Δ
→
0
∑
k
=
1
n
x
x
*
(
ln
x
k
*
)
Δ
x
k
on [1, 2]
With differentiation, one of the major concepts of calculus. Integration involves the calculation of an integral, which is useful to find many quantities such as areas, volumes, and displacement.
Find the area of the shaded region.
(a)
5-
y
3
2-
(1,4)
(5,0)
1
3
4
5
6
(b)
3 y
2
Decide whether the problem can be solved using precalculus, or whether calculus is required. If the problem can be solved using precalculus, solve it. If the problem seems to require calculus, use a graphical or numerical approach to
estimate the solution.
STEP 1: Consider the figure in part (a). Since this region is simply a triangle, you may use precalculus methods to solve this part of the problem. First determine the height of the triangle and the length of the triangle's base.
height 4
units
units
base
5
STEP 2: Compute the area of the triangle by employing a formula from precalculus, thus finding the area of the shaded region in part (a).
10
square units
STEP 3: Consider the figure in part (b). Since this region is defined by a complicated curve, the problem seems to require calculus. Find an approximation of the shaded region by using a graphical approach. (Hint: Treat the shaded regi
as…
Solve this differential equation:
dy
0.05y(900 - y)
dt
y(0) = 2
y(t) =
Suppose that you are holding your toy submarine under the water. You release it and it begins to ascend. The
graph models the depth of the submarine as a function of time.
What is the domain and range of the function in the graph?
1-
t (time)
1 2
4/5 6 7
8
-2
-3
456700
-4
-5
-6
-7
d (depth)
-8
D: 00 t≤
R:
Chapter 5 Solutions
Calculus: Early Transcendentals and MyLab Math with Pearson eText -- Title-Specific Access Card Package (3rd Edition) (Briggs, Cochran, Gillett & Schulz, Calculus Series)
Elementary Statistics: Picturing the World (7th Edition)
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Fundamental Theorem of Calculus 1 | Geometric Idea + Chain Rule Example; Author: Dr. Trefor Bazett;https://www.youtube.com/watch?v=hAfpl8jLFOs;License: Standard YouTube License, CC-BY