Given that
and
, if
is an arithmetic sequence, then the common difference between successive terms is
.
You then have
So the explicit formula for the
th term is
Answer: 7.5
Step-by-step explanation:
The given formula tells us that the next term f(n+1) of the sequence is -0.5 times the previous term f(n)
First term of the sequence is f(1) = 120
Second term of the sequence is f(2) = f(1+1) = -0.5 f(1) = -0.5 (120) = -60
Third term of the sequence is f(3) = f(2+1) = -0.5 f(2) = -0.5 (-60) = 30
Fourth term of the sequence is f(4) = f(3+1) = -0.5 f(3) = -0.5 (30) = -15
Fifth term of the sequence is f(5) = f(4+1) = -0.5 f(4) = -0.5 (-15) = <em>7.5</em>
Answer:
-3(r-2)/2
Step-by-step explanation:
r/
2
−
2
r
+
6
−
3
r
/2
−
2
r⋅
2/
2+
6
−
3
r/
2
+
−
2r
⋅
2/
2
+
6
−
3
r
−
2
r
⋅
2
/2
+
6
⋅
2/
2
+
−
3
⋅
2/
2
r
−
2
r
⋅2
+
6⋅
2
−
3
⋅
2
/2
r
−
4
r
+
12
−
6
/2
−3
(
r
−
2
)
/2
Hope that helps! Plz, mark brainiest! :D
Have a great day!
Answer:
sir please give the exact question
Step-by-step explanation:
That what we have to do with these three lines..
