Paper Reference(s)

Part (b) Most candidates scored the first M mark by expressing 2 log2(x – 1) as log2 (x – 1)2 but many then failed to gain any further marks. It was not uncommon for scripts to proceed from log2(11 – 6x) = log2(x – 1)2 + 3 to (11 – 6x) = (x – 1)2 + 3, resulting in the loss of all further available marks. ................
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