The coeffcients of the (r-1)^th, r^th an...

The coeffcients of the `(r-1)^th`, `r^th` and `(r+1)^th` terms in the expansion of `(x+1)^n` are in the ration 1 : 3: 5 Find n and r.

Verified by Experts

The correct Answer is:

n = 7; r =3

BINOMIAL THEOREM
NCERT BANGLISH|Exercise Miscellanous exercise on chapter 8|10 Videos
BINOMIAL THEOREM
NCERT BANGLISH|Exercise EXERCISE 8.1|14 Videos
APPENDIX 2 MATHEMATICAL MODELLING
NCERT BANGLISH|Exercise EXAMPLE|2 Videos
COMPLEX NUMBERS AND QUADRATIC EQUATIONS
NCERT BANGLISH|Exercise MISCELLANEOUS EXERCISES ON CHAPTER 24|1 Videos

Similar Questions

Explore conceptually related problems

If the coefficients of (r-5)^th and (2r - 1)^th terms in the expansion of (1 + x)^34 are equal, find r.

If the coefficients of (r-5) th and(2r-1) th terms in the expansion of (1+x)^(34) are equal, find rdot

If the coefficients of the (r-1) th and (2r+3) th terms in the equation of (1+x)^(15) are equal, find the value of r.

If the coffcients of the (4r+5) ans (2r+1) th terms in the expansion of (1+x)^(10) are equal , find the value of r .

The coefficients of 5th ,6th and 7th terms in the expansion of (1+x)^(n) are A.P . ,find n .

Find the r^th term from the end in the expansion of (x + a)^n .

If the coefficients of (p +1) th and (p+3)th terms in the expansion of (1+x)^(2n) be equal show that , p =n-1 .

If the coefficients of r^("th"),(r+1)^("th")and(r+2)^("th") terms in the expansion of (1+x)^(14) are in A.P ., then r is /are -

If the coefficients of 5th, 6th , and 7th terms in the expansion of (1+x)^n are in A.P., then n= a. 7 only b. 14 only c. 7 or 14 d. none of these

Find the (r+1)th term from the end in the expansion of (1-3x)^n .