If n! + (n-1)! =144, then the value of ...

If n! + (n-1)! =144, then the value of n is :

A

4

B

5

C

6

D

10

Verified by Experts

The correct Answer is:

B

COMBINATORICS AND MATHEMATICAL INDUCTION
PREMIERS PUBLISHERS|Exercise PROBLEMS FOR PRACTICE (Answer the following questions)|11 Videos
BINOMIAL THEOREMN,SEQUENCES AND SERIES
PREMIERS PUBLISHERS|Exercise PROBLEMS FOR PRACTICE(Choose the correct option for the following)|31 Videos
DIFFEREMTIAL CALCULUS DIFFERENTIABILITY AND METHODS OF DIFFERENTITAION
PREMIERS PUBLISHERS|Exercise PROBLEMS FOR PRACTICE|73 Videos

Similar Questions

Explore conceptually related problems

If n! +(n-1) ! =3, then find the value of n.

If 7!/n!=7 then the value of n is:

If U_n=int_0^1x^n(2-x)^ndxa n dV_n=int_0^1x^n(1-x)^n dx ,n in N , and if (V_n)/(U_n)=1024 , then the value of n is________

Suppose A is a complex number and n in N , such that A^n=(A+1)^n=1, then the least value of n is a. 3 b. 6 c. 9 d. 12

Let f(x)=(x-1)(x-2)(x-3)(x-n),n in N ,a n df(n)=5040. Then the value of n is________

If the constant term in the binomial expansion of (x^2-1/x)^n ,n in N is 15, then the value of n is equal to.

If 1/2, 1/3, n are the direction cosines of a line , then the values of n is

If 1/2,1/3,n are the direction cosines of a line , then the value of n is

If a_(1) = 4 and a_(n + 1) = a_(n) + 4n for n gt= 1 , then the value of a_(100) is