Basic of Logarithms
easy

જો ${{({e^x} + 2)} \over {({e^x} - 1)\,(2{e^x} - 3)}} = - {3 \over {{e^x} - 1}} + {B \over {2{e^x} - 3}}$, તો $B = $

A

$1$

B

$3$

C

$5$

D

$7$

Solution

(d) ${e^x} + 2 = – 3(2{e^x} – 3) + B({e^x} – 1)$

$ \Rightarrow $ $1 = – 6 + B$, $2 = 9 – B$ $ \Rightarrow $ $B = 7$.

Standard 11
Mathematics

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