Precalculus

Find the sum of the first 50 terms of the sequence 2,4,6,8........

That is twice the sum of 1+2+3+...+50

For 1+2+...+N, the sum is N(N+1)/2

The sum is therefore 2*[50*51)/2) = 2550

  1. 👍 0
  2. 👎 0
  3. 👁 78
asked by Laura

Respond to this Question

First Name

Your Response

Similar Questions

  1. Further mathematics

    An exponential sequence (GP)of positive terms and a linear sequence (AP)have the same first term.the sum of their first terms is 3,the sum of their second terms is 3 and the sum of their third terms is 6. Find the sum of their

    asked by Lizzy on June 30, 2013
  2. math

    The first and second terms of an exponential sequence (G.P) are respectively the first and third terms of a linear sequence (A.P). The fourth term of the linear sequence is 10 and sum of its first five terms is 60. find (a) the

    asked by Majors on February 1, 2016
  3. Further mathematics

    An exponential sequence of positive terms and a linear sequence have the same first term.the sum of their first terms is 3 the sum of their second terms is 3/2,and the sum of their third terms is 6.find their fifth terms.

    asked by Tosin on November 20, 2011
  4. furthermaths

    The sum of the first ten terms of a linear sequence is 60 and the sum of the first fifteen terms of the sequence is 165.find the 18th term of the sequence.

    asked by gwendoline on February 15, 2016
  5. Math *URGENT

    Please give the answers and solutions for each. 1.If the second term is 2 and the seventh term of a geometric sequence is 64, find the 12th term. 2. Which term if the geometric sequence 18,54,162,486,... is 3,188,646? 3. Determine

    asked by Aliza on December 20, 2012
  6. Further mathematics

    An exponential sequence of positive terms and a linear sequence have the same first terms.the sum of their second terms is 3/2 and the sum of their third terms is 6.find their fifth terms.

    asked by Tosin on November 20, 2011
  7. math

    in an arithmetic sequence the common difference is equal to 2.the first term is also the first term of a geometric sequence. the sum of the first 3 terms of an arithmetic sequence and the sum of the first 9 terms of an arithmetic

    asked by Brainblocked on January 30, 2015
  8. math

    in an arithmetic sequence whose first term is 4, the 1st, 3rd and 7th terms form consecutive terms of geometric sequence, find the sum of the first three terms of the arithmetic sequence

    asked by selina on December 20, 2015
  9. maths

    the sum of the first nine terms of an arithmetic sequence 216. The 1st, 3rd and 7th terms form the first three terms of a geometric sequence therefore find the common difference

    asked by Anonymous on February 1, 2016
  10. algebra 2 help please/check

    The first 3 terms in a geometric sequence are 1.1, 1.65, and 2.475. Part A: What is the sum of the first 6 terms of the sequence? Show your work. Part B: How does the sum of the seriesy differ from the 6th term? Explain. Part C:

    asked by jenny on May 20, 2012
  11. Algebra II

    The first 3 terms in a geometric sequence are 1.1, 1.65, and 2.475. Part A: What is the sum of the first 6 terms of the sequence? Show your work. Part B: How does the sum of the series differ from the 6th term? Explain. Part C: If

    asked by Danny on May 27, 2012

More Similar Questions