4 years ago

Pls help me with my maths Choices 2 4 6 8

Mathematics

1 answer:

EleoNora [17]4 years ago

3 0

22222222222222222222222222222222222222222222222222222222222222222222222222222 it 2

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1. The explicit formula an = 2–5(n-1) represents an arithmetic sequence. Write the recursive

Ivahew [28]

Answer:

$a_n=2,\:a_n=a_{n-1}-5$

Step-by-step explanation:

If you map the sequence out, you get the following values:

a = 1, a(n) = 2

a = 2, a(n) = -3

a = 3, a(n) = -8

As you can see, the first term is 2 and the sequence is decreasing by 5 each time. Therefore, the answer is D.

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3 years ago

What is the volume of the cone below21 4

Ksenya-84 [330]

Answer:

If 21 is the height, and 4 is the radius, then the volume is approx. 1055.58

Step-by-step explanation:

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3 years ago

Which one does it simplify to? please

9966 [12]

Answer:

$1 + { \sin} \theta$

Step-by-step explanation:

$\frac{ { \cos}^{2} \theta}{1 - \sin \theta} \\ \\ = \frac{ { \cos}^{2} \theta}{(1 - \sin \theta)} \times \frac{(1 + \sin \theta)}{(1 + \sin \theta)} \\ \\ = \frac{{ \cos}^{2} \theta(1 + { \sin} \theta)}{(1 - { \sin}^{2} \theta)} \\ \\ = \frac{{ \cancel{ \cos}^{2} \theta}(1 + { \sin} \theta)}{ \cancel{{ \cos}^{2} \theta}} \\ \\ = 1 + { \sin} \theta$