frac{x^2 + 13x + 15}{(2x + 3)(x + 3)^2} = | vedclass

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Question

(A) ધારો કે $\frac{x^2 + 13x + 15}{(2x + 3)(x + 3)^2} = \frac{A}{2x + 3} + \frac{B}{x + 3} + \frac{C}{(x + 3)^2}$.બંને બાજુ $(2x + 3)(x + 3)^2$ વડે ગુ

Vedclass · Accepted Answer

$\frac{1}{x + 3} - \frac{1}{2x + 3} + \frac{5}{(x + 3)^2}$

Vedclass · Answer

(A) ધારો કે $\frac{x^2 + 13x + 15}{(2x + 3)(x + 3)^2} = \frac{A}{2x + 3} + \frac{B}{x + 3} + \frac{C}{(x + 3)^2}$.બંને બાજુ $(2x + 3)(x + 3)^2$ વડે ગુણતા:$x^2 + 13x + 15 = A(x + 3)^2 + B(2x + 3)(x + 3) + C(2x + 3)$.$x = -3$ માટે,$C = 5$ મળે છે.$x = -\frac{3}{2}$ માટે,$A = -1$ મળે છે.$x^2$ ના સહગુણકોને સરખાવતા:$1 = A + 2B \Rightarrow B = 1$.આમ,જવાબ $\frac{1}{x + 3} - \frac{1}{2x + 3} + \frac{5}{(x + 3)^2}$ છે.

$\frac{x^2 + 13x + 15}{(2x + 3)(x + 3)^2} = $

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