CA Foundation Exam > CA Foundation Questions > Which term of the progression –1, ̵...
Start Learning for Free
Which term of the progression –1, –3, –5, …. Is –39
- a)21st
- b)20th
- c)19th
- d)none of these
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which term of the progression –1, –3, –5, …. I...
The general formula for an arithmetic sequence is:
a(n) = a + d(n-1)
a : first term (-1)
d : common difference (-2)
n : number of the term you want.
Plug in your values:
a(n) = -1 - 2(n - 1)
We can simplify that slightly if you like:
a(n) = -1 - 2n + 2
a(n) = 1 - 2n
Now you can figure out the value of n when a(n) = -39:
-39 = 1 - 2n
-40 = -2n
n = -40/-2
n = 20
It is the 20th term.
Most Upvoted Answer
Which term of the progression –1, –3, –5, …. I...
Given, the progression is 1, 3, 5, ...
To find: Which term of the progression is 39?
Let's find the common difference of the progression first.
Common difference (d) = 3 - 1 = 2
Now, let's find the nth term of the progression using the formula:
aₙ = a₁ + (n-1)d
where a₁ is the first term and d is the common difference.
We want to find the term which is equal to 39. So, we can write:
39 = 1 + (n-1)2
Simplifying this equation, we get:
38 = 2(n-1)
19 = n-1
n = 20
Therefore, the 20th term of the progression is 39.
Hence, the correct option is (b) 20th.
To find: Which term of the progression is 39?
Let's find the common difference of the progression first.
Common difference (d) = 3 - 1 = 2
Now, let's find the nth term of the progression using the formula:
aₙ = a₁ + (n-1)d
where a₁ is the first term and d is the common difference.
We want to find the term which is equal to 39. So, we can write:
39 = 1 + (n-1)2
Simplifying this equation, we get:
38 = 2(n-1)
19 = n-1
n = 20
Therefore, the 20th term of the progression is 39.
Hence, the correct option is (b) 20th.
Free Test
FREE
| Start Free Test |
Community Answer
Which term of the progression –1, –3, –5, …. I...
|
Explore Courses for CA Foundation exam
|
|
Similar CA Foundation Doubts
Top Courses for CA FoundationView all
Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer?
Question Description
Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer? for CA Foundation 2025 is part of CA Foundation preparation. The Question and answers have been prepared according to the CA Foundation exam syllabus. Information about Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for CA Foundation 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer?.
Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer? for CA Foundation 2025 is part of CA Foundation preparation. The Question and answers have been prepared according to the CA Foundation exam syllabus. Information about Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for CA Foundation 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for CA Foundation.
Download more important topics, notes, lectures and mock test series for CA Foundation Exam by signing up for free.
Here you can find the meaning of Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which term of the progression –1, –3, –5, …. Is –39a)21stb)20thc)19thd)none of theseCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice CA Foundation tests.
|
|
Explore Courses for CA Foundation exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup