1. Solve the following: a) x² – 9x = 0 b) x2 + 4x – 21 = 0 c) x? – 25 = 0 %3|

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Q: 11) 3, -18, 108, –648, ... А) а %3Dа -6 n-1 a, = 3 B) a,- = a n-1 -6 =-18 С) а %3Dа. n-1 -4 а, 3D 18

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