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A1 and A2 are arithmetic progressions. First term of both the progressions is 72. For A1, the sum of the first 30 terms is equal to the sum of the first 43 terms. If common difference of A2 is 1 less than that of A1, find the sum of first 7 terms of A2.
Correct answer is '441'. Can you explain this answer?
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A1 and A2 are arithmetic progressions. First term of both the progress...
For A1, let the common difference be d.
Answer: 441
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Most Upvoted Answer
A1 and A2 are arithmetic progressions. First term of both the progress...
Using the formula of sum of nterms in ap
equate the sum of 1st 30terms equal to sum of 1st 43terms
solve it .it will give d=-2
now put it in sum formula for 7terms of a2
a=72 and d=-2-1=-3
which gives sum as 441
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Community Answer
A1 and A2 are arithmetic progressions. First term of both the progress...
For A1, let the common difference be d.
Answer: 441
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A1 and A2 are arithmetic progressions. First term of both the progressions is 72. For A1, the sum of the first 30 terms is equal to the sum of the first 43 terms. If common difference of A2 is 1 less than that of A1, find the sum of first 7 terms of A2.Correct answer is '441'. Can you explain this answer?
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A1 and A2 are arithmetic progressions. First term of both the progressions is 72. For A1, the sum of the first 30 terms is equal to the sum of the first 43 terms. If common difference of A2 is 1 less than that of A1, find the sum of first 7 terms of A2.Correct answer is '441'. Can you explain this answer? for CAT 2024 is part of CAT preparation. The Question and answers have been prepared according to the CAT exam syllabus. Information about A1 and A2 are arithmetic progressions. First term of both the progressions is 72. For A1, the sum of the first 30 terms is equal to the sum of the first 43 terms. If common difference of A2 is 1 less than that of A1, find the sum of first 7 terms of A2.Correct answer is '441'. Can you explain this answer? covers all topics & solutions for CAT 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A1 and A2 are arithmetic progressions. First term of both the progressions is 72. For A1, the sum of the first 30 terms is equal to the sum of the first 43 terms. If common difference of A2 is 1 less than that of A1, find the sum of first 7 terms of A2.Correct answer is '441'. Can you explain this answer?.
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