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If .^(20)C(1)+(2^(2)).^(20)C(2)+(3^(2))....

If `.^(20)C_(1)+(2^(2)).^(20)C_(2)+(3^(2)).^(20)C_(3)+……..+(20^(2)).^(20)C_(20)=A(2^(beta))` then the ordered pair `(A,beta)` is equal to

A

(420,18)

B

(380,19)

C

(380,18)

D

(380,18)

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The correct Answer is:
A
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ALLEN-Solutions of Triangle & Binomial Theorem-EXERCISE (J-M)
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  13. If some three consecutive coefficeints in the binomial expanison of (x...

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