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4 years ago

Which statement describes the sequence −9, −3, 3, 9, 15?

Mathematics

2 answers:

Arada [10]4 years ago

6 0

C. An arithmetic sequence with common difference 6

Natasha_Volkova [10]4 years ago

3 0

Answer:

C. An arithmetic sequence with a common difference of 6.

Step-by-step explanation:

A is incorrect because the common difference is not -9 (not constant).

B is incorrect because the common difference is not 3 (not constant).

C is the correct answer because the common difference is 6 (constant).

D is incorrect because this is an arithmetic sequence.

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-9 + 6 = -3

-3 + 6 = 3

3 + 6 = 9

9 + 6 = 15

The common difference is +6 (positive 6).

Hope that helps!

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$\longrightarrow \underline{\underline{\dfrac{(cost + sint )(cost - sint)}{cos^2t}}}$

Or else we can also write it using ,

$\longrightarrow cos2\phi = cos^2\phi - sin^2\phi$

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$\rule{200}{4}$

Additional info :-

Derivation of cos²x - sin²x = cos2x :-

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$\rule{200}{4}$

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