Algebra II

posted by .

I solved one of these sigma notations and had Reiny check it in an earlier post but this one totally befuddles me-
Which of the following terms would not be in the series generated by the expression: 5
Signma symbol (k^2-5k+2)
k=2

the choices are 2, -2, 4 or -4If you could even just provide a starting point- we are just learning this and I'm not doing too great right now-thank you but I'm trying

  • Algebra II -

    the 5 should be on top then the signma symbol in middle and the k=2 on the bottom with the equation (k^2 -5k+2) to the right of all of it

  • Algebra II -

    It simply means subbing in k=2, k=3 ... k=5 into the expression and adding up the results
    that is.

    = (2^2 - 5(2) + 2) + (3^2 - 5(3) + 2) + ... + (5^2 - 5(5) + 2)
    = -4 + (-4) + (-2) + 2

    I can see why you would be confused, since none of your choices are NOT a term generated by the expression.
    Misprint in the question?
    Question is faulty?

  • Algebra II-Reiny please recheck -

    No the way I typed is is the way it is written--
    5 on top, sigma symbol in middle and k=2 on bottom with the equation (k^2-5k+2) to the right and the answers are possible:
    4, -4, 2, -2
    I'm not sure if I see (4) used above when you substituuted-is that the one not generated??

  • Algebra II -

    of course!
    You are right, I guess I can't read my own typing

    4 is it!

  • Algebra II -

    Thank you

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. further mathematics

    The roots of the eqn, x^4 + px^3 + qx^2 + rx + s = 0 where p, q, r, s are constants and s does not equal to 0, are a, b, c, d. (i) a^2 + b^2 + c^2 + d^2 = p^2 -2q (in terms of p & q) (ii) 1/a + 1/b + 1/c + 1/d = -r/s (in terms of r …
  2. Calculus!!!

    I need your help... I've posted this question a while ago but no one has answered it yet. Please please help me. Which of the following series can be used to compute ln(.8)?
  3. Calculus

    Obtain the MacLaurin series for 1/(2-x) by making an appropriate substitution into the MacLaurin series for 1/(1-x). ------------ The MacLaurin series for 1/(1-x) = Σ x^k I substitue (x-1) in for x, because 1/(2-x) = 1/(1-(x-1)) …
  4. Arithmetic Series - - Reiny

    Consider the series defined by Sn = 3n-1 Find the first four terms of the series. How exactly do I do this?
  5. Calculus - - Reiny

    If S1 = 0.7 and S2 = 2.1 in geometric series, what would the sum of the first 12 terms in the series be?
  6. Pre-CalcPlease check

    Please check: 1.Write in expanded form: this is a sigma notation- 4 on top signma in middle k=1 on bottom to right of sigma is (k-1)(k-2) I solved: k=1 (1-1)(1-2)=0(-1)=0 K=2 (2-1)(2-2) = 1(0)=0 k=3(3-1)(3-2)=2(1)=2 k=4 (4-1)(4-)=3(2)=6 …
  7. Reiny or Damon or Bobpursley

    Express the series 11 + 18 + 27 +...+ 171 using sigma notation. Usually you would take 27-18 and that's the step between numbers, right?
  8. math

    I just need help with this. Write the series in sigma notation. 1/4 + 1/2+ 3/4 + 1 + 5/4 + 3/2 5 A.) 1/4 sigma N n=1 6 B.) 1/4 sigma n n=1 5 C.)sigma n/n+3 n=1 6 D.)sigma n/n+3 n=1
  9. math

    I just need help with this. Write the series in sigma notation. 1/4 + 1/2+ 3/4 + 1 + 5/4 + 3/2 5 A.) 1/4 sigma N n=1 6 B.) 1/4 sigma n n=1 5 C.)sigma n/n+3 n=1 6 D.)sigma n/n+3 n=1
  10. algebra

    Thank you Reiny, we typed it in incorrectly, but believe we have solved it. Will post later.

More Similar Questions