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Mathematics, 05.11.2019 19:31 ashleypaz15

Using the limit definition, how do you find the derivative of f(x) =sqrt (x 1) ?

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Answer from: kayleenfifep3hgi4

= √x
y=x12

Differentiate w.r.t "x" on both sides:

dydx=ddx[x12]

dydx=12x12−1 (because ddx[xn]=nxn−1)

dydx=12x−12

And it can also be written as:

dydx=12√x

Or, if you meant the limit definition of the derivative function it would look like this:

f'(x)=limh→0f(x+h)−f(x)h

f'(x)=limh→0√x+h−√xh

Now, we multiply the numerator and the denominator by the conjugate of the numerator (conjugates are the sum and difference of the same two terms such as a + b and a - b).

f'(x)=limh→0√x+h−√xh⋅√x+h+√x√x+h+√x

Since (a+b)(a−b)=a2−b2 we get

f'(x)=limh→0x+h−xh(√x+h+√x)

Simplifying, we get

f'(x)=limh→0hh(√x+h+√x)

f'(x)=limh→01√x+h+√x

If we evaluate the limit by plugging in 0 for h we get

f'(x)=1√x+0+√x=1√x+√x=12√x

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Answer from: Quest

a) one student is chosen from classroom a, then a student is chosen from classroom b.

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b. this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes. this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes. this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes. this makes them dependent events.

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Answer from: Quest

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

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