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vesna_86 [32]
3 years ago
14

What is the minimum value of F(x)= 10x^{2} -6x-3 3/10 or -39/10

Mathematics
1 answer:
kolezko [41]3 years ago
6 0

Answer: 3/10

Step-by-step explanation:

Take the derivative of 10x^2-6x-3 to get 20x-6. Set that equal to 0 to find the critical points of the function. The critical points is when the slope is either 0 or undefined.

Now do:

20x-6=0\\20x=6\\x=\frac{6}{20} = \frac{3}{10}

There are quite a few more steps to actually find the minimum, but for this example you can automatically assume its a minimum because it is the only critical point of the function. Ill show you these extra steps tho.

Plug in two numbers into the derivative. One that is less than 3/10 and one that is greater than 3/10. The numbers 0 and 1 are fine. When x = 0, the function is -6. When x = 1, the function is +14. A switch from negative to positive indicates a minimum value

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Solve the system by substitution<br> 10x=y<br><br> 2x+y=-24
masha68 [24]

Answer: x=-2

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Step-by-step explanation

You replace the y in the second equation with 10x. This is because it says 10x=y

2x+10x=12x so you put that

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To get x by its self you divide by 12.

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Now you plug in -2 to either equation as y. I chose the first one because it's easier.

10(-2)=y

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8 0
2 years ago
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Akimi4 [234]
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Read 2 more answers
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