Question

np4=9.np3, then what's the value of n​

Answer 1

Answer:

Step-by-step explanation:

np₄ = 9. np₃

=> n!/(n - 4)! = 9. n! / (n - 3)!

=> n!/(n - 4)! = 9 . n! / (n - 3)(n - 4)!

//Striking out n!/(n - 4)!  on both sides

=> 1 = 9 / n - 3

=> n - 3 = 9

=> n =  9 + 3 = 12.

Answer 2

Answer:

the answer is 12 yarrr..