Question

Find n if n-1 p3 : np4 = 1:9

Answer 1

Hey mate here is your answer :

•n-1P3 / nP4 = 1/9

• 9(n-1) (n-2) (n-3) (n-4) (n-5) (n-6) (n-7) (n-8) = n(n-1) (n-2) (n-3)

• 9(n-4) (n-5) (n-6) (n-7) (n-8) = n

• 9 = n (n-3)

• n²- 3n = 9

• by solving it by quadratic formula we get the value of n is 9

Answer 2

Answer:

annswer is 9

Step-by-step explanation:

n-1P3 / nP4 = 1/9

9(n-1) (n-2) (n-3) (n-4) (n-5) (n-6) (n-7) (n-8) = n(n-1) (n-2) (n-3)

9(n-4) (n-5) (n-6) (n-7) (n-8) = n

9 = n (n-3)

n²- 3n = 9