Answer:
1/4 3/4 1/2.
it could be any of the above
Answer:
1)12 2)
Step-by-step explanation:
Problem 1:
a(5)=25 a(3)=13
a(5)-a(3)=25-13=12
mark brainliest
Answer:
(a)= option 3
(b)= option 3
Step-by-step explanation:
(A) It is given that a sequence is defined by the recursive function
and 
Now, substituting the value of n=2 in above equation,



Again putting n=3,



Putting n=4,



Putting n=5,



Putting n=6,



Putting n=7,



Hence, option 3 is correct.
(B) The given sequence is :
5, -10, 20, -40, 80.....
Since, the given sequence is GP, therefore
and r=-2
The nth term is given by:

For fifteenth term, put n=15 in above equation, we get

=
=
Hence, the fifteenth term is 81920.
Option 3 is correct.
3/5 is your answer. Hope this helps. There’s a picture attached with the work.