10:55 TIME REMAINING 54:33 The first figure of the Sierpinski triangle has one shaded triangle. The second figure of the Sierpinski triangle has three shaded triangles. The third figure of the Sierpinski triangle has nine shaded triangles. Which summation represents the total number of shaded triangles in the first 15 figures? 15 Σ131 15 Σ11- 15 A-1 Σ -1 15 Σ3υ- n=1 Wext Save and Exit Submit Mark this and return O

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