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Was just going through a past trial paper from my school, i got a different answer to the solutions at the back. Question was: Find the second derivative of (3x2 - 4)7 My answer was 1512x2(3x2 - 4)5 The solutions answer was 42(3x2 - 4)5(39x2 - 4) Just wanted to know if i did it wrong, or if...