If (lim)x1x2−1asin(x−1)+bcos(x−1)+4=−2,then∣a+b∣ is_______

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If {({lim})}_{{{x}{{1}}}}{{{a}{{{({x}-{1})}}}+{b}{{{({x}-{1})}

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If $(lim)_{x 1} \frac{a sin ( x - 1 ) + b cos ( x - 1 ) + 4}{x ^{2} - 1} = - 2, t h e n ∣ a + b ∣$ is_______

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(lim)_{x 1} \frac{a sin ( x - 1 ) + b cos ( x - 1 ) + 4}{x ^{2} - 1} = - 2, t h e n ∣ a + b ∣

is_______

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Question Text

(lim)_{x 1} \frac{a sin ( x - 1 ) + b cos ( x - 1 ) + 4}{x ^{2} - 1} = - 2, t h e n ∣ a + b ∣

is_______