c1 question on finding value of n for Un Watch

Lj345
Badges: 0
#1
Report Thread starter 8 years ago
#1
Hi people, I have given the equation below..

Un= (-1)^n n/n+4, Un = 7/9

please could somebody show me how to work it out...
0
reply
jakash
Badges: 12
Rep:
?
#2
Report 8 years ago
#2
If 7/9 is positive, then you know n must be an even number, for the (-1)^n part to also be positive.
Then, to find n, you basically need to solve n/n+4 = 7/9 for n.
(Hint: multiply through by n+4 and 9)
0
reply
Lj345
Badges: 0
#3
Report Thread starter 8 years ago
#3
(Original post by jakash)
If 7/9 is positive, then you know n must be an even number, for the (-1)^n part to also be positive.
Then, to find n, you basically need to solve n/n+4 = 7/9 for n.
(Hint: multiply through by n+4 and 9)
Hi I dont get how to answer the question I need somebody to show me how exactly how to answer this via step by step because i am confused about this question.. And i learn better by being shown how I question is done so I can attempt the rest in my exercise book.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of the Arts London
    MA Design: Ceramics, Furniture or Jewellery Open Day Postgraduate
    Fri, 25 Jan '19
  • Coventry University
    Undergraduate Open Day Undergraduate
    Sat, 26 Jan '19
  • Brunel University London
    Undergraduate Experience Days Undergraduate
    Sat, 26 Jan '19

Do you think the internet has made political discussion more aggressive?

Yes (16)
94.12%
No (1)
5.88%

Watched Threads

View All