Question

Np13 :( n+1)p 12= 3:4 then nc1

Answer 1

Answer:

n=15

Step-by-step explanation:

4 (n!/ (N-13)!) = 3 {(n+1)! / (n+1-12)!}

4 n!/ (n-13)! = 3 ((n+1)!/(N-11)!)

4. (n-11)! / (एन -13)! = 3 (n+1)! / n!

4. (n -11) (n -12) = 3 (n + 1)

4 (n² - 23n + 132) =

3n + 3 4n² - 92n + 528 -

3n -3 = 0 4x² - 95n + 525 = 0

( 4n - 35) (n- 15) = 0

4n -35 = 0

n = 35/4

n - 15 = 0

n = 15