if f(1)=3 and f(n)=-2f(n-1)+5 then f(5)=?
Answers
Answered by
2
Answer:
.....................................
Step-by-step explanation:
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Answered by
0
Step-by-step explanation:
Explanation:
f
(
1
)
=
3
f
(
n
)
=
−
2
f
(
n
−
1
)
+
1
f
(
2
)
=
−
2
f
(
1
)
+
1
f
(
2
)
=
−
2
(
3
)
+
1
=
−
6
+
2
=
−
5
f
(
3
)
=
−
2
f
(
2
)
+
1
f
(
3
)
=
−
2
(
−
5
)
+
1
f
(
3
)
=
11
f
(
4
)
=
−
2
(
f
(
3
)
)
+
1
f
(
4
)
=
−
2
(
11
)
+
1
f
(
4
)
=
−
22
+
1
=
−
21
f
(
5
)
=
−
2
(
f
(
4
)
)
+
1
f
(
5
)
=
−
2
(
−
21
)
+
1
f
(
5
)
=
42
+
1
f
(
5
)
=
43
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