Definition: The area A of the region S that lies under the graph of the continuous function f is the limit of the sum of the areas of approximating rectangles A = lim Rn = lim [f(x1)Ax + f(x2)Ax + · … + f(xn)Aæ]. n00 n00 (a) Use the above definition to determine which of the following expressions represents the area under the graph of f(x) = x° from a = 0 to z = 1. A. lim n00 3 1 B. lim i=1 1 C. lim S n 5 D. lim nH00 i=1 (b) Evaluate the limit that is the correct answer to part (a). You may find the following formula for the sum of cubes helpful: n(n+1 13 + 23 + 33 +……+n³ =

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Definition: The area A of the region S that lies under the graph of the continuous function f is the limit of the sum of the areas of approximating
rectangles
A = lim Rn = lim [f(x1)Ax + f(x2)Ax + · …· + f(xn)Aæ].
n00
(a) Use the above definition to determine which of the following expressions represents the area under the graph of f(x) = x³ from a = 0 to a = 1.
A. lim
n
i
1
В. lim
n
(;)3
1
C. lim
n00
i=1
n
D. lim
i=1
(b) Evaluate the limit that is the correct answer to part (a). You may find the following formula for the sum of cubes helpful:
n(n + 1)
13 + 23 + 33 +... +n³ = i³ =
2
i=1
Transcribed Image Text:Definition: The area A of the region S that lies under the graph of the continuous function f is the limit of the sum of the areas of approximating rectangles A = lim Rn = lim [f(x1)Ax + f(x2)Ax + · …· + f(xn)Aæ]. n00 (a) Use the above definition to determine which of the following expressions represents the area under the graph of f(x) = x³ from a = 0 to a = 1. A. lim n i 1 В. lim n (;)3 1 C. lim n00 i=1 n D. lim i=1 (b) Evaluate the limit that is the correct answer to part (a). You may find the following formula for the sum of cubes helpful: n(n + 1) 13 + 23 + 33 +... +n³ = i³ = 2 i=1
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