3 years ago

Here is a list of numbers.

Mathematics

1 answer:

liq [111]3 years ago

8 0

Answer:

13,27,43,23,39.

i think these r the prime numbers

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Find the explicit formula for the sequence? -1,4,-16,64......

Ede4ka [16]

The explicit formula for given sequence is: $a_n = -1 . (-4)^{n-1}$

Step-by-step explanation:

Given sequence is:

-1,4,-16,64.....

We can see that there is no same difference between consecutive terms so we will find common ratio to see if it is a geometric sequence.

Here

$a_1 = -1\\a_2 = 4\\a_3 = -16\\a_4 = 64\\r = \frac{a_2}{a_1} = \frac{4}{-1} = -4\\r = \frac{a_3}{a_2} = \frac{-16}{4} = -4$

The explicit formula for geometric sequence is:

$a_n = a_1r^{n-1}$

Putting the values of r and a1

$a_n = -1 . (-4)^{n-1}$

Hence

The explicit formula for given sequence is: $a_n = -1 . (-4)^{n-1}$

Keywords: Geometric sequence, common ratio

Learn more about geometric sequence at:

#learnwithBrainly

5 0

3 years ago

Laura has 3.85 pounds of bananas. She goes to the store to buy 2.75 more pounds of bananas to make banana bread. Each loaf requi

Inessa [10]

Answer:

Step-by-step explanation:

3.85+2.75= 6.6

6.6÷0.30= 22

6 0

2 years ago

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Andrew has pencils and erasers. The ratio of the number of

Natalija [7]

Answer:

12 pencils

Step-by-step explanation:

36/6 = 6

you need to divide 36 by 6 as there are 36 pencils.

= 2 * 6 = 12

6 0

2 years ago

What times what equals 50

klasskru [66]

Twenty-five times two = fifty

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2 years ago

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If a triangle has sides 4, 6 and 10 and a 2nd similar triangle has a perimeter of 60, find the 2nd largest side of the 2nd trian

algol13

The first triangle has a perimeter of 4+6+10 = 20.

The 2nd longest side is 6/20 = 3/10 of the perimeter. In the larger triangle, the 2nd longest side will have length (3/10)*60 = 18.

_____
These side lengths mean the "triangle" is a line segment. That is, it has zero area.

8 0

3 years ago