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lawyer [7]
3 years ago
5

Find the intervals from which f is increasing or decreasing for f(x)=3x^2/5-x^3/5

Mathematics
1 answer:
Solnce55 [7]3 years ago
5 0
f(x)=3x^{2/5}-x^{3/5}

We get the derivative : f'(x)=3*2/5*x^{2/5-1}-3/5*x^{3/5-1}=\dfrac{6}{5x^{3/5}}-\dfrac{3}{5x^{2/5}}

f'(x) is negative for x<0.

Let's look at the critical points other than at x=0:
f'(x)=0 <=> 6/5-(3/5)x^(1/5)=0 <=> x^(1/5)=(6/5)*(5/3)=2 hence x=2^5=32

There is a critical point at x=32; for x<=32 f' is positive, for x>=30 f' is negative.

The derivative is positive for positive xs and negative for negative xs, hence f is increasing for 32>=x>0, and decreasing for x<0 and x>32
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blondinia [14]

Answer:

X=62

Step-by-step explanation:

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3 0
2 years ago
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Our class has 50 students. Assuming that no students are born on leap days (February29), what is the probability that no two stu
madreJ [45]

Answer:  a) \dfrac{799}{31250}  b) \dfrac{30451}{31250}

Step-by-step explanation:

Since we have given that

Number of days in a year = 365

Number of students = 50

Probability that no two students share the same birthday. It means each student has different birthday.  

Probability(no two students share the same birthday)=\dfrac{365-1}{365}\times \dfrac{365-2}{365}........\times \dfrac{365-50}{365}

Probability(no two students share the same birthday)=\dfrac{^{365}P_{50}}{365^{50}}

Probability(no two students share the same birthday)=\dfrac{799}{31250}\approx 0.025568

Probability that at least one of the students has the same birthday as another student in the class is given by

1-P(\text{no student share the same birthday})\\\\=1-\dfrac{799}{31250}\\\\=\dfrac{30451}{31250}=0.974432

5 0
3 years ago
Como se multiplican polinomios
seraphim [82]
I hope you speak english, because although i understood your question I don't know enough spanish to respond in it. You multiply polynomials by multiplying each part of one polynomial by all the other parts of the others, and then adding it all. For example: (ax+b) * (x+c) = (ax*x)+(ax*c)+(b*x)+(b*c) = a x^{2}  + acx + bx+bc

Comprehende? 
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2 years ago
6th-grade math, help me please:)
riadik2000 [5.3K]

Answer:

1. is b and 2. is c

Step-by-step explanation:

4 0
3 years ago
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(Will award Brainlies &amp; many many points, please help!)
iren [92.7K]

Answer:

B] f(n) = 6(3)n − 1; f(5) = 486

Step-by-step explanation:

First, you have to identify which type of relation the points have. From the graph you can tell that it's an exponential growth. The x values change in the same amount every time, in this case by 1.

So if the relation is exponential, if we divide the y coordinates you should get the same result every time.

18 / 6 = 3

54 / 18 = 3

162 / 54 = 3

So the y value increases 3 times. That means that the next value should be 162*3 = 486.

3 0
3 years ago
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