Find the sum of series 1^3+3^3+5^3+…………………………..+11^3.(a) 2556(b) 5248(c) 6589(d) 9874I have been asked this question in examination.I need to ask this question from Sum to n Terms of Special Series topic in section Sequences and Series of Mathematics – Class 11

Find the sum of series 1^3+3^3+5^3+…………………………..+11

1.	Find the sum of series 1^3+3^3+5^3+…………………………..+11^3.(a) 2556(b) 5248(c) 6589(d) 9874I have been asked this question in examination.I need to ask this question from Sum to n Terms of Special Series topic in section Sequences and Series of Mathematics – Class 11
Answer» The CORRECT choice is (a) 2556 Best explanation: 1^3+3^3+5^3+…………………………..+11^3 = (1^3+2^3+3^3+……+11^3) – (2^3+4^3+6^3+8^3+10^3) = (1^3+2^3+3^3+……11^3) – 2^3(1^3+23+3^3+4^3+5^3) = (1112/2)^2 – 8(56/2)^2 = 66^2-8*15^2 = 4356 – 1800 = 2556.

Discussion

No Comment Found

Related InterviewSolutions

If a=3 and r=2 then find the sum up 5^th term.(a) 95(b) 82(c) 93(d) 97This question was addressed to me in unit test.This interesting question is from Geometric Progression(G.P.) in section Sequences and Series of Mathematics – Class 11
If r=1 in a G.P. then what is the sum to n terms?(a) n*a(b) a/n(c) (n-1) a(d) (n+1) aI had been asked this question in examination.Question is taken from Geometric Progression(G.P.) in section Sequences and Series of Mathematics – Class 11
a1 = a2 = 2, an = an – 1–1, n > 2. Find a5.(a) 2(b) -1(c) 1(d) 0I had been asked this question in an internship interview.I would like to ask this question from Sequences in chapter Sequences and Series of Mathematics – Class 11
Find sum of series 2+3+5+7.(a) 5(b) 10(c) 17(d) infiniteI had been asked this question in an interview for job.This question is from Series topic in division Sequences and Series of Mathematics – Class 11
Which of the following is finite sequence?(a) 48,24,12, ………….(b) 1,2,3, …………(c) 2,4,6,8,10(d) 2,3,5,7,11,13, ……………………This question was posed to me in exam.My query is from Sequences in section Sequences and Series of Mathematics – Class 11
Find the sum of series 6^2+7^2+…………………..+15^2.(a) 55(b) 1185(c) 1240(d) 1385I got this question during an online exam.Enquiry is from Sum to n Terms of Special Series topic in division Sequences and Series of Mathematics – Class 11
If two numbers are 2 and 6 then find their arithmetic mean.(a) 3(b) 4(c) 5(d) 8The question was posed to me in an online interview.I want to ask this question from Arithmetic Progression(A.P.) topic in portion Sequences and Series of Mathematics – Class 11
Which term of G.P. 25, 125, 625, …………. is 390625?(a) 5(b) 6(c) 7(d) 8This question was addressed to me in an internship interview.My enquiry is from Geometric Progression(G.P.) topic in chapter Sequences and Series of Mathematics – Class 11
If in an A.P., first term is 20 and 12^th term is 120. Find the sum up to 12^th term.(a) 420(b) 840(c) 140(d) 1680The question was asked during an internship interview.Question is from Arithmetic Progression(A.P.) in portion Sequences and Series of Mathematics – Class 11
1+2+3+4 or 10 is a series?(a) 1+2+3+4 only(b) 10 only(c) 1+2+3+4 and 10(d) neither 1+2+3+4 nor 10The question was posed to me during an online exam.Enquiry is from Series in section Sequences and Series of Mathematics – Class 11

Find the sum of series 1^3+3^3+5^3+…………………………..+11^3.(a) 2556(b) 5248(c) 6589(d) 9874I have been asked this question in examination.I need to ask this question from Sum to n Terms of Special Series topic in section Sequences and Series of Mathematics – Class 11

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment