CA Foundation Exam > CA Foundation Questions > The 20th term of the progression 1, 4, 7, 10....
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The 20th term of the progression 1, 4, 7, 10.................is
- a)58
- b)52
- c)50
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The 20th term of the progression 1, 4, 7, 10.................isa)58b)5...
Given: Progression 1, 4, 7, 10, ...
To find: 20th term
Approach:
- The given progression is an arithmetic progression where the common difference is 3.
- The nth term of an arithmetic progression can be given by the formula: a + (n-1)d, where a is the first term and d is the common difference.
- Using the above formula, we can find the 20th term of the given progression.
Calculation:
- First term, a = 1
- Common difference, d = 3
- 20th term = a + (n-1)d = 1 + (20-1)*3 = 1 + 57 = 58
Therefore, the 20th term of the given progression is 58.
Hence, the correct answer is option (a) 58.
To find: 20th term
Approach:
- The given progression is an arithmetic progression where the common difference is 3.
- The nth term of an arithmetic progression can be given by the formula: a + (n-1)d, where a is the first term and d is the common difference.
- Using the above formula, we can find the 20th term of the given progression.
Calculation:
- First term, a = 1
- Common difference, d = 3
- 20th term = a + (n-1)d = 1 + (20-1)*3 = 1 + 57 = 58
Therefore, the 20th term of the given progression is 58.
Hence, the correct answer is option (a) 58.
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Community Answer
The 20th term of the progression 1, 4, 7, 10.................isa)58b)5...
Tn=a+(n-1)d. {d=t(2)-t(1)= 4-1=3}
t(20) = 1+(20-1)3 = 1+19(3) = 1+57 = 58
The option is "A"
t(20) = 1+(20-1)3 = 1+19(3) = 1+57 = 58
The option is "A"
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The 20th term of the progression 1, 4, 7, 10.................isa)58b)52c)50d)none of theseCorrect answer is option 'A'. Can you explain this answer?
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