maths science and geography

posted by .

in a geometric sequence,the fifth term is four times the third term,and the second term is 4.if r<0 determine the value of r,the common ratio

  • maths science and geography -

    a r^4 = 4 a r^2

    r^2 = 4
    r = +/- 2


Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    the third term of a geometric sequence is t3= -75 and the sixth term is t6= 9375. determine the first term and the common ratio
  2. Math

    A sequence is formed by adding together the corresponding terms of a geometric sequence and and an arithmetic sequence.The common ratio of the geometric sequence is 2 and the common difference of the arithmetic sequence is 2.The first …
  3. Alg2

    A geometric sequence has a common ratio of 4. If the fifth term in the sequence is 2256, what is the second term?
  4. Arithmetic Sequence

    Given the third term of an arithmetic sequence less than the fourth term by three. The seventh term is two times the fifth term. Find the common difference and the first term.
  5. Math

    The fifth term of an arithmetic progression is three times the second term,and the third term is 10.a)What is the first term,b)the common difference and c)the 15th term?
  6. Maths

    1..The first 2 terms of a geometric progression are the same as the first two terms of an arithmetic progression.The first term is 12 and is greater than the second term.The sum of the first 3 terms od the arithmetic progression is …
  7. math

    The third term of a geometric progressiom is nine times the first term.if the second term is one-twenty fourth the fifth term.find the fourth^2=9a. r=sqr of 9 r=3.pls teach me how to get the first term and i can get the 4th …
  8. maths

    if the second term of an arithmetic sequence is 15 and the fifth term is 24. determine the third and fourth term of the sequence
  9. maths

    Given that the sum of the first four terms of a geometric sequence is 10 and the fourth term is half the third term . find the common ratio and the first term
  10. Algebra

    I am so lost on these problems. Write a geometric sequence that starts with 3 and has a common ratio of 5. What is the 23rd term in the sequence. Write an arithmetic sequence that has a common difference of 4 and the eighth term is …

More Similar Questions