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The constant 'c' of Lagrange's mean valu...

The constant 'c' of Lagrange's mean value theorem of the function
`f(x)=(2x+3)/(4x-1)` defined on [1,2] is

A

(a) `(1+sqrt15)/3`

B

(b) `(1+sqrt21)/4`

C

(c) `5/3`

D

(d) `3/2`

Text Solution

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The correct Answer is:
B
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