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tmua.me Tau Paper 1 · Q4

Paper 1Powers & logarithmsFunctions & graphsSequences & series

For how many real values of aa does the equation

∣log⁡2(x2−ax+52)∣=∣log⁡2x∣\left|\log_2\left(x^2-ax+\frac52\right)\right| =\left|\log_2 x\right|

have exactly three distinct real solutions which, in increasing order, form an arithmetic progression?

A33
B22
C11
D44
E55

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