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The expression (x+sqrt(x^3-1))^7+(x-sqrt...

The expression `(x+sqrt(x^3-1))^7+(x-sqrt(x^3-1))^7` is a polynomial of degree

A

10

B

9

C

8

D

7

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The correct Answer is:
A
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PATHFINDER-BINOMIAL THEOREM-QUESTION BANK
  1. The number of distinct terms in the expansion of (x^3+1+(1/x^3)): xinK...

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  2. The number of integral of integral terms in the expansion of (17^(1/3)...

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  3. The expression (x+sqrt(x^3-1))^7+(x-sqrt(x^3-1))^7 is a polynomial of ...

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  4. The coefficient of x^(50) in (1+x)^(41)(1-x+x^2)^(40)is

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  5. The coefficient of x^n in the expansion (2x+3)^n-(2x+3)^(n-1)(5-2x)+(2...

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  6. The coefficient of x^(65) in the expansion of (1+x)^(131)(x^2-x+1)^(30...

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  7. Remainder when 5^(40) is divided by 11.

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  8. If (1+x-2x^2)^6=1+a1x+a2x^2+……+a(12)x^12 then

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  9. Number of values of r satisfying the equation ,^69C(3r-1) -^(69)C(r^2)...

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  10. In the expansion of (x+(a/x^2))^n, (ane0) if term independent of x doe...

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  11. If f(n)=sum(r=1)^n[r(n ^(n-1)C(r-1)-r^C(r-1))+(2r+1)^nCr]

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  12. The value of ,^nC0 + ^(n+1)C1 +^(n+2)C2+……+^(n+k)Ck is equal to

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  13. If the expansion of (x+(alpha/x))^n and (x+(beta/x^2))^n in powers of ...

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  14. The coefficient of the middle term in the expansion of (1+x)^(2n) is

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  15. If the term independent of x in the expansion of (sqrtx+(k/x^2))^10 is...

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  16. If n is a positive integer then in the trinomial expansion of (x^2+2x+...

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  17. Which of the following will not be true?

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  18. Consider following two infinite series in real r and 0 C=1+rcostheta...

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  19. Consider following two infinite series in real r and 0 C=1+rcostheta...

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  20. First three terms in the expansion of (x+a)^n are respectively 128, 22...

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