An expression for the nth triangular number is n(n + 1)/2. Write down the 20th triangular number.
Question:
An expression for the nth triangular number is n(n + 1)/2. Write down the 20th triangular number.
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 71% (7 reviews)
answer The 20th triangular number can be fou...View the full answer
Answered By
Aketch Cindy Sunday
I am a certified tutor with over two years of experience tutoring . I have a passion for helping students learn and grow, and I firmly believe that every student has the potential to be successful. I have a wide range of experience working with students of all ages and abilities, and I am confident that I can help students succeed in school.
I have experience working with students who have a wide range of abilities. I have also worked with gifted and talented students, and I am familiar with a variety of enrichment and acceleration strategies.
I am a patient and supportive tutor who is dedicated to helping my students reach their full potential. Thank you for your time and consideration.
0.00
0 Reviews
10+ Question Solved
Related Book For
Complete Pure Mathematics 1 For Cambridge International AS & A Level
ISBN: 9780198427438
2nd Edition
Authors: Jean Linsky, Brian Western, James Nicholson
Question Posted:
Students also viewed these Mathematics questions
-
Write an expression for the nth term of the geometric sequence. Then find the missing term. 1. a1 = 4, r = 1 / 2, a10 =? 2. a1 = 5, r = 7 /2, a8 =? 3. a1 = 6, r = - 1 / 3, a12 =? 4. a1 = 64, r = - 1...
-
Write an expression for the apparent nth term (an) of the sequence. (Assume that n begins with 1.) 1. 3, 7, 11, 15, 19, . . . 2. 0, 3, 8, 15, 24, . . . 3. 3, 10, 29, 66, 127, . . . 4. 91, 82, 73, 64,...
-
Write an expression for the nth term of the geometric sequence. Then find the 10th term of the sequence. 1. a1 = 100, r = 1.05 2. a1 = 5, r = 0.2 3. a1 = 18, a2 = 9
-
Sketch the graph and draw several vertical and horizontal traces. (x, y) = sin(x y)
-
Tora Co. plans to produce 1,020 units in July. Each unit requires two hours of direct labor. The direct labor rate is $20 per hour. Prepare a direct labor budget for July.
-
Demonstrate that the constant K in Equation 17.23 will have values of 534 and 87.6 for the CPR in units of mpy and mm/yr,respectively. KW pAt CPR (17.23)
-
Distinguish between the key characteristics used in the classification of kin and give examples of different kinship systems.
-
Colorado Mining paid $600,000 to acquire a mine with 40,000 tons of coal reserves. The following statements model reflects Colorado Minings financial condition just prior to purchasing the coal...
-
MacroApps Corporation's disclosure notes for the year ending June 30, 2020, included the following regarding its $0.00000625 par common stock: Employee Stock Purchase Plan-We have an ESPP for all...
-
David R. and Ella M. Cole (ages 39 and 38, respectively) are husband and wife who live at 1820 Elk Avenue, Denver, CO 80202. David is a self-employed consultant, specializing in retail management and...
-
The 1st and 2nd terms of a geometric progression are 4 and 12, respectively. Find the sum of the first ten terms.
-
In an arithmetic progression the 8th term is 39 and the 4th term is 19. Find the 1st term and the sum of the first 12 terms.
-
Paulettes Plants, Inc., has a total debt ratio of .62. What is its debt-equity ratio? What is its equity multiplier?
-
If \(h(x)=3 x-1\), find a. \(h(0)\) b. \(h(-10)\) c. \(h(a) \)
-
The information is based on the spreadsheet as shown .Suppose Ingredient I is made up of \(80 \%\) micoden and \(20 \%\) water, Ingredient II is made up of \(30 \%\) micoden, \(50 \%\) bixon, and...
-
In Problems 9-16, find the indicated matrices, if possible. \[[\mathrm{A}]=\left[\begin{array}{rr}1 & 2 \\4 & 0 \\-1 & 3 \\2 & 1 \end{array} ight] \quad[\mathrm{B}]=\left[\begin{array}{rr}4 & 2 \\-1...
-
The information is based on the spreadsheet as shown Suppose Ingredient I is made up of \(80 \%\) micoden and \(20 \%\) water, Ingredient II is made up of \(30 \%\) micoden, \(50 \%\) bixon, and \(20...
-
In Problems 9-16, find the indicated matrices, if possible. \[[\mathrm{A}]=\left[\begin{array}{rr}1 & 2 \\4 & 0 \\-1 & 3 \\2 & 1 \end{array} ight] \quad[\mathrm{B}]=\left[\begin{array}{rr}4 & 2 \\-1...
-
Name this molecule. HCH CH3 CH3
-
Consider the following cash flows in Table P5.5. (a) Calculate the payback period for each project. (b) Determine whether it is meaningful to calculate a payback period for project D. (c) Assuming...
-
If we do not want to assume normality for these distributions, then what statistical procedure can be used to compare the three groups? Gastroenterology In Table 12.39, we present data relating...
-
Perform the test mentioned in Problem 12.42, and report a p-value. How do your results compare with a parametric analysis of the data? Gastroenterology In Table 12.39, we present data relating...
-
Estimate the intra-class correlation for each of plasma estrone, plasma and rostenedione, and plasma testosterone, and provide associated 95% confidence limits. Is the reproducibility of these...
-
we have two products A brings in $ 8 / unit in profits B brings $ 5 / unit . we need to produce exactly 4 0 0 units of any product: lower results in wasted input, we don't have capacity. We also have...
-
Virtual meetings using collaboration software is generally used when participants are dispersed over a large geographic area. Research on the Internet for software being used today and register for a...
-
Find the values for A and B such that the function below is differentiable at x=0. 2+1 if x 0 f(x)= Asin (a) + B cos (a) if x < 0
Study smarter with the SolutionInn App