find n if P (9,5) + 5P (9,4) =P (10,n)
Answers
Answered by
8
Answer:
We have
9
P
5
.
9
P
4
=
10
P
r
.
⇒
(9−5)!
9!
+5
(9−4)!
9!
=
(10−r)!
10!
⇒
4!
9!
+5
5!
9!
=
(10−r)!
10!
⇒
4!
9!
+
4!
9!
=
(10−r)!
10!
⇒2×
4!
9!
=
(10−r)!
10!
⇒
5×4!
5×2×9!
=
(10−r)!
10!
⇒
5!
10×9!
=
(10−r)!
10!
⇒
5!
10!
=
(10−r)!
10!
⇒(10−r)!=5!⇒10−r=5⇒r=5
Answered by
4
Answer:
find n if P (9,5) + 5P (9,4) =P (10,n)
Step-by-step explanation:
sorry don't know
take care
thanks for the points
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