Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


K and 1/k [1]

a sub n = a sub 1 (r raise to n-1)

1/k = k (r^2)
_/r^2 = _/1/k^2
common ratio=1/k

Formula again.

1/k=a sub 1 (1/k)
k[1/k=a sub 1 (1/k)]k
a sub 1 =1

Ans. Geometric mean between k and 1/k is 1.

Final ans. is 1
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts