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Activity 3. Looking for Common? write whether each sequence is arithmetic or geometric sequence. if arithmetic find the common difference and if geometric find the common ratio. EXAMPLE: 4, 8, 16, 32, ... Geometric: r = 2 1. 6, 26, 36, 46,... 2. 2, 12, 72, 432,... 3. 3, 15, 75, 375,... 4. 243, 81, 27, 9, 3,... 5. - 39,- 47,-55, -63, ...​