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Anna35 [415]
3 years ago
7

Is (8,-16) a function

Mathematics
1 answer:
koban [17]3 years ago
7 0

Answer:

No, 8-16 is not a function

8-15a is a function

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James is X years older than Alex. Alex is X years older than Kim. James is twice as old as Kim. Alex is 24. Which of the followi
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A sequence of numbers follows the rule: multiply the previous number by -2 and add 3. The fourth term in the sequence is -7. Giv
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Answer:

Next 3 terms: 17, -31, 65

3 terms before -7: 2, -1, 5

Step-by-step explanation:

Fourth term in the sequence = -7

Rule for finding the next term:

a_n=-2\times a_{n-1}+3

Therefore, the fifth term:

a_5=-2\times a_4+3\\\Rightarrow a_5=-2\times -7+3\\\Rightarrow \bold{a_5=17}

Sixth term:

a_6=-2\times a_5+3\\\Rightarrow a_6=-2\times 17+3\\\Rightarrow \bold{a_6=-31}

Seventh term:

a_7=-2\times a_6+3\\\Rightarrow a_7=-2\times -31+3\\\Rightarrow \bold{a_7=65}

Let the three terms that came before -7 be: x, y, z

As per question statement:

a_n=-2\times a_{n-1}+3

-7 = -2\times z+3\\\Rightarrow -2z=-10\\\Rightarrow z=5

Again applying the given rule:

5 = -2\times y+3\\\Rightarrow y =-1

Again applying the given rule:

-1 = -2\times x+3\\\Rightarrow x =2

Therefore the 3 terms before -7 are:

2, -1, 5

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