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Zetta Paper 1 · Q3

Paper 1Powers & logarithms

What are the solution(s) to

ln⁡(x2+4x−90)=ln⁡(−2x+1)\ln(x^2+4x-90)=\ln(-2x+1)

for all real xx?

A13,713,7
B−13,7-13,7
C−13,−7-13,-7
D−13-13
E77

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