5. When the polynomial function \( k x ^ { 3 } - 3 x ^ { 2 } + 5 x - 8 \) is divided by \( x - 2 \) the remainder is \( 22 \) . What is the remainder if the same polynomial is divided by \( x + 1 \) ? [3]
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Certain radioactive material decays in such a way that the mass remaining after \( t \) years is given by the function
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