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3 years ago

Amir picked 20 berries Becky picked 15 more than Amir How many berries did they picked in all

Mathematics

2 answers:

makkiz [27]3 years ago

7 0

Answer:

Step-by-step explanation:

Amir picked 20, Becky picked 15 more which is 35

all together they picked 20 + 35 = 55

dimaraw [331]3 years ago

6 0

Answer:

55 berries

Step-by-step explanation:

Given,

Amir = 20 berries

Becky = Amir + 15 = 20+15=35 berries

Total berries = Amir + Becky = 20 + 35 = 55 berries

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Step-by-step explanation:

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4 years ago

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

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4 years ago