3 years ago

Find the next two terms of this sequence-7, 14 ,-28

Mathematics

1 answer:

motikmotik3 years ago

3 0

Answer:

56, -112. -2 times every number

Step-by-step explanation:

I hope this helped!! :)

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By simplifying the left hand side using the Pythagorean Identity.

EXPLANATION

The given identity is

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$\csc^{2} (x) - \cot^{2} (x) = \frac{1}{\sin^{2} (x)} - \frac{ \cos^{2} (x)}{\sin^{2} (x)}$

Collect LCM for the denominators.

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This implies that:

$1 - \cos^{2} (x) = \sin^{2} (x)$

We substitute this to get,

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