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f ' (2x-1) . [2] = 16 x [ dlm kurung diturunkan juga ]
f '(2x-1) = 8x
f ' ( - 2) = f '(2x-1) maka x = - 1/2 coba kamu substitusi x = -1/2 nanti dpt hasil -2
maka utk x = -1/2 berlaku f ' (-2) = 8 ( - 1/2) = - 4 [ x diganti - 1/2 ]
jawaban D jadi tdk perlu cari f(x) dulu langsung saja diturunkan