Home
Class 11
MATHS
If the coefficients of x^2a n d\ x^3 in ...

If the coefficients of `x^2a n d\ x^3` in the expansion o `(3+a x)^9` are the same, then the value of `a` is `-7/9` b. `-9/7` c. `7/9` d. `9/7`

A

`(-7)/(9)`

B

`(-9)/(7)`

C

`(7)/(9)`

D

`(9)/(7)`

Text Solution

Verified by Experts

The correct Answer is:
(d)
Promotional Banner

Topper's Solved these Questions

  • BINOMIAL THEOREM

    CBSE COMPLEMENTARY MATERIAL|Exercise SHORT ANSWER TYPE QUESTIONS((section-B)|7 Videos

  • BINOMIAL THEOREM

    CBSE COMPLEMENTARY MATERIAL|Exercise SHORT ANSWER TYPE QUESTIONS (section-C)|18 Videos

  • BINOMIAL THEOREM

    CBSE COMPLEMENTARY MATERIAL|Exercise LONG ANSWER TYPE QUESTIONS(Section-D)|16 Videos

  • COMPLEX NUMBERS AND QUADRATIC EQUATIONS

    CBSE COMPLEMENTARY MATERIAL|Exercise Short Answer Type Questions|49 Videos

Similar Questions

Explore conceptually related problems

If the cofficients of x^(2) and x^(3) in the expansion 0(3+ax)^(9) are the same,then the value of a is -(7)/(9) b.-(9)/(7) c.(7)/(9) d.(9)/(7)

If the coefficents of x^(2) and x^(3) in the expansion of (3+px)^(9) are the same then prove that p= 9/7 .

The coefficient of x^(7) in the expansion of (1+x)^(9) is

" 9.The coefficient of "x^(7)" in the expansion of "(1-x^(4))(1+x)^(9)" is "

Find the value of -3/7+9/7

If th term in the expansion of (2x^(2)-(1)/(x))^(12) is without x then r is equal to a.7 b.8 c.9d .

The number of terms in the expansion of (1+7sqrt(2x))^9+(1-7sqrt(2x))^9 is

If 3/4 is equivalent to x/(28), then the value of x is 6 (b) 7 (c) 8 (d) 9

If 3 (5x-7) -4 (8x-13) =2 (9x-11)-17 , then the value of (7x-5)/(11x-9) is

Find the value of : ((3.9)^2-(1.7)^2)/(3.9-1.7)