What is the correct answer to the following summation: 20 Σ (21) i=10 Recall the formula: n Σ1 i=1 Select one: O a 420 - 90 O b. Oc 40-41/2 O d. 20-11/2 = 420/2-90/2 n·(n+1)/2
What is the correct answer to the following summation: 20 Σ (21) i=10 Recall the formula: n Σ1 i=1 Select one: O a 420 - 90 O b. Oc 40-41/2 O d. 20-11/2 = 420/2-90/2 n·(n+1)/2
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 25RE
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Transcribed Image Text:What is the correct answer to the following summation:
20
Σ (21)
i=10
Recall the formula:
n
Σ1 = n·(n+1)/2
i=1
Select one:
O a. 420-90
O b.
O c. 40-41/2
O d. 20-11/2
420/2-90/2
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