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2 years ago

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What is the formula for the following geometric sequence? -5, -10, -20, -40, ...

1 answer:

gtnhenbr [62]2 years ago

3 0

The formula/rule for this sequence is 2x (x times 2).

The first thing you'd have to do is figure out how much the terms are going up each time. Each time the terms are going up by twice the amount before. Since the 10 or the 40 aren't positive numbers, the numbers are hoing up by 2 instead on -2.

I hope this helps!

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Given that original lenght of the board before cut $= \frac{7}{10}$ meter

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Now we have to find the lenght of the piece which is cut.

To find that we just need to subtract smaller piece from larger piece

Required Length $= \frac{7}{10}-\frac{3}{10}$ meter

Required Length $= \frac{7-3}{10}$ meter

Required Length $= \frac{4}{10}$ meter

reduce the fraction

Required Length $= \frac{2}{5}$ meter

Hence final answer is $\frac{2}{5}$ meter.

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