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Basic of Logarithms
easy
જો ${{3x + a} \over {{x^2} - 3x + 2}} = {A \over {(x - 2)}} - {{10} \over {x - 1}}$, તો
A
$a = 7$
B
$a = - 7$
C
$A = 13$
D
$(a)$ અને $(c)$ બંને
Solution
(d) ${{3x + a} \over {{x^2} – 3x + 2}} = {A \over {(x – 2)}} – {{10} \over {(x – 1)}}$
==> $(3x + a) = A(x – 1) – 10(x – 2)$
==> $3 = A – 10$, $a = – A + 20$
(On equating coefficients of $x$ and constant term)
==> $A = 13, a = 7.$
Standard 11
Mathematics