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Let a = min{x^(2) +2x + 3, x in R ) & b...

Let `a = min{x^(2) +2x + 3, x in R ) ` & `b underset( theta rarr 0 ) ( "lim")( 1- cos theta)/( theta^(2))`. The value of `underset( r= 0 )overset( n ) ( sum ) a^(r) b^(n-r) ` is

A

`(2^(n+1) -1)/( 3.2^(n))`

B

`(2^(n+1) +1)/( 3.2^(n))`

C

`(4^(n+1) -1)/( 3.2^(n))`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
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