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26.06.2019 •
Mathematics
How to write an exponential function from a table
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Ответ:
Step-by-step explanation:
I'll show you with an example. I'll make a table and then show you how to find the exponential equation, ok?
x y
0 3
1 12
2 48
3 192
The standard form of an exponential equation is
We will take 2 (x,y) coordinates from our table and fit them into the equations to solve for a and b. Using the point (0, 3):
b to the 0 power is equal to 1, so the equation then becomes a(1) = 3 so a = 3. We will use the other x, y coordinate along with that a value to now solve for b:
b to the first is b, so now that equation becomes 3b = 12 and b = 4. Filling that info back into the standard form:
There you go!
Ответ:
2(3x+y)
...
We were told that 3x+y=6 so
2(3x+y)=2(6)
6x+2y=12