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If the coefficients of x^7 and x^8 in ...

If the coefficients of `x^7 and x^8` in the expansion of `[2 +x/3]^n` are equal, then the value of n is : (A) 15 (B) 45 (C) 55 (D) 56

A

56

B

55

C

47

D

19

Text Solution

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The correct Answer is:
B
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