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2 years ago

Help me please on this please open the whole photo so you can see other problems

Mathematics

1 answer:

OlgaM077 [116]2 years ago

7 0

Answer: 1. 57

2. 43

3. 20

4. 32

5. 16

Step-by-step explanation: am here to help

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The graph of a proportional relationship contains the point (8,4)

hichkok12 [17]

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Step-by-step explanation:

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2 years ago

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2 years ago

Prove that an = 4^n + 2(-1)^nis the solution to

olga nikolaevna [1]

Answer:

See proof below

Step-by-step explanation:

We have to verify that if we substitute $a_n=4^n+2(-1)^n$ in the equation $a_n=3a_{n-1}+4a_{n-2}$ the equality is true.

Let's substitute first in the right hand side:

$3a_{n-1}+4a_{n-2}=3(4^{n-1}+2(-1)^{n-1})+4(4^{n-2}+2(-1)^{n-2})$

Now we use the distributive laws. Also, note that $(-1)^{n-1}=\frac{1}{-1}(-1)^n=(-1)(-1)^{n}$ (this also works when the power is n-2).

$=3(4^{n-1})+6(-1)^{n-1}+4(4^{n-2})+8(-1)^{n-2}$

$=3(4^{n-1})+(-1)(6)(-1)^{n}+4^{n-1}+(-1)^2(8)(-1)^{n}$

$=4(4^{n-1})-6(-1)^{n}+8(-1)^{n}=4^n+2(-1)^n=a_n$

then the sequence solves the recurrence relation.

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3 years ago

Solve -7(3x-7)+21x_>50

ohaa [14]

Answer:

There are no solutions.

Step-by-step explanation:

Let's solve your inequality step-by-step.

−7(3x−7)+21x≥50

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2 years ago

Triangle ABC is similar to triangle DEF. What is the value of x ?

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2 years ago

Help me please on this please open the whole photo so you can see other problems ​

Help me please on this please open the whole photo so you can see other problems