We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
65
2
avatar

Please help me with these questions, thanks :)

 

#1

 

#2

 

#3

 

#4

 

I'm not at all good with sequences, so help with the above questions would be greatly appreciated. thanks

 Mar 21, 2019
 #1
avatar+101387 
0

First one :

 

an  = (2/5)(5)n - 1

 

Recursive rule  :   a1  = 2/5       an  =  5an-1 

 

 

Second one :

 

a1 = 2         an  =  (1/3)an-1

 

Explicit Rule :     an  =  2(1/3)n-1

 

 

Third one 

 

6, -18, 54, -162        [ note that the common ratio = -3 ]

 

Recursive Rule :    a1  = 6        an  =  (-3)an-1

 

 

 

Fourth one :  9, 6,  4, 8/3

 

The common ratio is   :     6 / 9    =  2/3

 

Explicit Rule :    an  = 6(2/3)n-1 

 

 

 

cool cool cool

 Mar 21, 2019
 #2
avatar
+1

Thanks so much!!!

Guest Mar 21, 2019

10 Online Users

avatar