Answer
Step by step text solution for The sum of first 15 terms of an A.P. is 750 and its first term is 15. Find its 20th term. by MATHS experts to help you in doubts & scoring excellent marks in Class 11 exams.
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CENGAGE PUBLICATION-SEQUENCES AND SERIES-All Questions
- If A.M., G.M., and H.M. of the first and last terms of the series of 1...
05:14
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- The sum 1+3+7+15+31+...to100 terms is a. 2^(100)-102 b. 2^(99)-101 c...
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- The sum of first 15 terms of an A.P. is 750 and its first term is 15. ...
02:03
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- Let S=4/(19)+(44)/(19^2)+(444)/(19^3)+ u ptooo . Then s is equal to a....
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- If the sum to infinity of the series 1+2r+3r^2+4r^3+ is 9/4, then val...
01:57
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- The sum o f series 1+4/5+7/(5^2)+(10)/(5^3)+oo is a. 7//16 b. 5//16 ...
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- The sum 20 terms of a series whose rth term is given by Tr=(-1)^r((r^2...
03:21
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- Consider the sequence 1,2,2,4,4,4,4,8,8,8,8,8,8,8,8,... Then 1025th te...
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- If the first term of an A.P. is – 18 and its 10th term is zero, then f...
01:12
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- Suppose that F(n + 1) =(2F(n) + 1)/2 for n = 1,2,3,,,, and F(1) = 2. T...
04:15
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01:23
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- The first and the last terms of an A.P. are 17 and 350 respectively. I...
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- If a ,b ,and c are in A.P., then a^3+c^3-8b^3 is equal to (a).2a b c (...
01:22
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02:26
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