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The coefficients of (2 r+4)^(th) and (r-...

The coefficients of `(2 r+4)^(th)` and `(r-2)^(th)` terms in the expansion of `(1+x)^(18)` are equal. Then the value of r=

A

12

B

10

C

8

D

6

Text Solution

Verified by Experts

The correct Answer is:
D
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HIMALAYA PUBLICATION-BINOMIAL THEOREM-QUESTION BANK
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  3. The coefficients of (2 r+4)^(th) and (r-2)^(th) terms in the expansion...

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  9. If the rth term is the middle term in the expansion of (x^(2)-(1)/(2x)...

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  10. The sum (1)/(2)""^(10)C(0)-""^(10)C(1)+2.""^(10)C(2)-2^(2)*""^(10)C(3)...

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  16. 20 C(0)+20 C(1)+20 C(2)+.. .+20 C(10) =

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  17. If the coefficients of x^(7) and x^(8) in (2+(x)/(3))^(n) are equal, t...

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  18. The coefficient of x^(5) in (1+x^(2))^(5)(1+x)^(4) is

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  19. In the expansion of (x^(2)+(2)/(x))^(n) for positive integer n has a t...

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