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Rational Expressionshard
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Determine the value of kkk such that the rational function f(x)=2x2+kx−15x2−9f(x) = \frac{2x^2 + kx - 15}{x^2 - 9}f(x)=x2−92x2+kx−15​ has a removable discontinuity at x=−3x = -3x=−3.