5 3
If - 2n-=-n, the value of nis
6 4
3
2 5
a) b)
d)
2
5
4
c)
(
)
1
Answers
Answered by
2
Answer:
n
C
r
=
4
3
n−r
r+1
=
4
3
n
C
r+2
n
C
r+1
=
5
4
n−r−1
r+2
=
5
4
Onsolvingabovewegetr=26,n=62
2n+3r=238
n
C
r+1
n
C
r
=
4
3
n−r
r+1
=
4
3
n
C
r+2
n
C
r+1
=
5
4
n−r−1
r+2
=
5
4
Onsolvingabovewegetr=26,n=62
2n+3r=238
supriya4528:
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Answered by
1
Answer:
2nd Term =
n
C
1
(a
1/13
)
(n−1)
(
a−1
a
)
1
=14a
5/2
⇒na
13
n−1
.a
3/2
=14a
5/2
⇒ Comparing both sides
⇒
13
n−1
+
2
3
=
2
5
⇒
13
n−1
=1⇒n−1=13
⇒n=14
n
C
2
n
C
3
⇒
2!(n−2)!
n!
3!(n−3)!
n!
=
n!3!(n−3)!
2!(n−2)!n!
⇒
3!11!
2!12!
=
3
12
=4
Step-by-step explanation:
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