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The coefficient of the middle term in th...

The coefficient of the middle term in the expansion of `(1+x)^40` is

A

`(1.3.5----39)/(20!).2^20`

B

`(1.3.5---39)/(20!)`

C

`(40!)/(20!)`

D

`40!2^20`

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-BINOMIAL THEOREM-EXERCISE - II
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  2. If the middle term of (1+x)^ (2n) is (1.3.5….(2n-1)k)/(n!) then k=

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  3. The coefficient of the middle term in the expansion of (1+x)^40 is

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  5. In the expansion of (1 + x)^n if the 2nd and 3rd terms are respectivel...

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  6. (18^3+7^3+3.18. 7. 25)/(3^6 +6.243.2+15.81.4+20.27.8+15.9.16+6.3.32+64...

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  7. The expansion [x+(x^3-1)^(1//2)]^5+[x-(x^3-1)^(1//2)]^5 is a polynomia...

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  8. If the ratio of the 7th term from the beginning to the 7th term from t...

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