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- : Multi-dimensional data analysis, reduce CPC cost and improve ROI
- : Keyword tools to capture market trends and tap potential explosive models
- (2) Negative numbers: Negative numbers also have four power roots, but they are complex numbers. For example, the fourth power root of -16 is 2i and -2i because (2i)⁴ = -16;
- (3) Zero: The fourth root of 0 is 0, because 0⁴=0;
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