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3 years ago

3. For the following geometric sequence, determine a1 and r and find an explicit formula for the sequence: 2, -6, 18, -54…

Mathematics

1 answer:

Vilka [71]3 years ago

4 0

Step-by-step explanation:

a1 is the first term. In this case, 2.

r is the common ratio. Each term is multiplied by -3 to get the next term, so r = -3.

an = 2 (-3)ⁿ⁻¹

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Oduvanchick [21]

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3 years ago

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Marizza181 [45]

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3 years ago

There is a bag with only red marbles and blue marbles.

Genrish500 [490]

Answer:

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3 years ago

I need some help with this

masya89 [10]

Answer:

A, C, D

Step-by-step explanation:

Consider triangles NKL and NML. These triangles are right triangles, because

$m\angle K=m\angle M=90^{\circ}$

In these right triangles:

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Thus, triangles NKL and NML by HA postulate. Congruent triangles have congruent corresponding parts, so

$\overline{KN}\cong \overline{NM}\\ \\\overline{KL}\cong \overline{LM}\ [\text{option D is true}]$

Since

$\overline{KN}\cong \overline{NM},$

then

$7x-4=5x+12\\ \\7x-5x=12+4\\ \\2x=16\\ \\x=8\ [\text{option A is true}]\\ \\MN=KN=7\cdot 8-4=56-4=52\ [\text{option C is true}]$

Option B is false, because KN=52 units.

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3 years ago

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torisob [31]

So u have to solve for p to do that you must isolate p by moving -6 after the equal sign -5+6=1 and there is the answer: 1 hope this helps!!

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3 years ago