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Summing Geometric Progressions printable sheet
Watch the video below to see how Alison works out the sum of the first twenty terms of the sequence: $$2, 8, 32, 128, 512 ...$$
Can you adapt Alison's method to sum the following sequences?
Can you find an expression for the following sum up to the nth term? $$a + ar + ar^2 + ar^3 + ...$$