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If x is so small, that x^5 and higher po...

If x is so small, that` x^5 `and higher power of x may be neglected, then the coefficient of `x^4 ` in the expansion of `[x^2+4]^(1/2)` -`(x^2+9)^(1/2)`

A

`(-19)/(1728)`

B

`(43)/(1728)`

C

`(-43)/(1728)`

D

`(43)/(1728)`

Text Solution

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The correct Answer is:
B
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