7.Binomial Theorem
normal

$(x + 2)^{n-1} + (x + 2)^{n-2}. (x + 1) + (x + 2)^{n-3} . (x + 1)^2; + ...... + (x + 1)^{n-1}$ ના વિસ્તરણમાં $x^r (0 \le r \le n - 1)$ નો સહગુણક મેળવો 

A

$^nC_r (2^r - 1)$

B

$^nC_r (2^{n-r} - 1)$

C

$^nC_r (2^r + 1)$

D

$^nC_r (2^{n-r} + 1)$

Solution

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Standard 11
Mathematics

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