if nc4=nc5 find 16cn. pls tell me the answer quickly today my exam l will not need any irrelevant answer pls.
Answers
Answered by
7
Answer
Correct option is
A
14
If a,b,c are in A.P, then 2b=a+c
So applying the same condition, we have
2×(
n
C
5
)=(
n
C
6
)+(
n
C
4
)
5!(n−5)!
2×n!
=
6!(n−6)!
n!
+
4!(n−4)!
n!
5!(n−5)!
2
=
6!(n−6)!
1
+
4!(n−4)!
1
5!(n−5)(n−6)!
2
=
6!(n−6)!
1
+
4!(n−4)(n−5)(n−6)!
1
5!(n−5)
2
=
6!
1
+
4!(n−4)(n−5)
1
5×4!×(n−5)
2
=
6×5×4!
1
+
4!(n−4)(n−5)
1
5×(n−5)
2
=
6×5
1
+
(n−4)(n−5)
1
5×(n−5)
2
−
(n−4)(n−5)
1
=
6×5
1
12n−78=n
2
−9n+20
n
2
−21n+98=0
(n−7)(n−14)=0
∴ n=14 or n=7
Answered by
4
Answer:
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities.
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