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ehidna [41]
2 years ago
12

F(n + 1) = f(n) – 3. If f(4) = 22, what is f(1)?

Mathematics
1 answer:
Aloiza [94]2 years ago
5 0

Answer:

f(1) = 31.

Step-by-step explanation:

f(n + 1) = f(n) - 3

So f(4) = f(3) - 3

22 = f(3) - 3

f(3) =  22 + 3 = 25

so  f(2) = 25 + 3 = 28

and f(1) = 28 + 3 = 31.

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5 + 14 x y = 9 x y - 5
Anon25 [30]

Answer:

xy = -2

Step-by-step explanation:

To solve:

5 + 14xy = 9xy - 5

=> First subtract 9xy from each side of "="

5 + 5xy = -5

=> Now, subtract 5 from each side:

5xy = -10

=> Finally divide 5 on each side:

xy = -10/5

xy = -2

Hope this helps!

4 0
2 years ago
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Answer:

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How to solve derivative of (sin3x)/x using first principle ​
Leona [35]

\dfrac{d}{dx}(\dfrac{\sin(3x)}{x})

First we must apply the Quotient rule that states,

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This means that our derivative becomes,

\dfrac{\dfrac{d}{dx}(\sin(3x))x-\dfrac{d}{dx}(x)\sin(3x)}{x^2}

Now we need to calculate \dfrac{d}{dx}(\sin(3x)) and \dfrac{d}{dx}(x)

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From here the new equation looks like,

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And that is the final result.

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