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3 years ago

Please help this one is really confusing.

Mathematics

1 answer:

Talja [164]3 years ago

4 0

There is no answer choice for the question

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4.(-x 4 + 13x 5 + 6x 3 ) + (6x 3 + 5x 5 + 7x4)

grigory [225]

Answer:

140

Step-by-step explanation:

=(-4+55+18)+(18+25+28)

=69+71

=140

3 0

4 years ago

4−32⋅(−0.25)−12÷13, what's the answer?

vampirchik [111]

The answer is 144 over 13

8 0

3 years ago

Read 2 more answers

F(x) = 3x + x3

____ [38]

Answer:

Please check the explanation.

Step-by-step explanation:

Given

f(x) = 3x + x³

Taking differentiate

$\frac{d}{dx}\left(3x+x^3\right)$

$\mathrm{Apply\:the\:Sum/Difference\:Rule}:\quad \left(f\pm g\right)'=f\:'\pm g'$

$=\frac{d}{dx}\left(3x\right)+\frac{d}{dx}\left(x^3\right)$

solving

$\frac{d}{dx}\left(3x\right)$

$\mathrm{Take\:the\:constant\:out}:\quad \left(a\cdot f\right)'=a\cdot f\:'$

$=3\frac{d}{dx}\left(x\right)$

$\mathrm{Apply\:the\:common\:derivative}:\quad \frac{d}{dx}\left(x\right)=1$

$=3\cdot \:1$

$=3$

now solving

$\frac{d}{dx}\left(x^3\right)$

$\mathrm{Apply\:the\:Power\:Rule}:\quad \frac{d}{dx}\left(x^a\right)=a\cdot x^{a-1}$

$=3x^{3-1}$

$=3x^2$

Thus, the expression becomes

$\frac{d}{dx}\left(3x+x^3\right)=\frac{d}{dx}\left(3x\right)+\frac{d}{dx}\left(x^3\right)$

$=3+3x^2$

Thus,

f'(x) = 3 + 3x²

Given that f'(x) = 15

substituting the value f'(x) = 15 in f'(x) = 3 + 3x²

f'(x) = 3 + 3x²

15 = 3 + 3x²

switch sides

3 + 3x² = 15

3x² = 15-3

3x² = 12

Divide both sides by 3

x² = 4

$\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$x=\sqrt{4},\:x=-\sqrt{4}$

$x=2,\:x=-2$

Thus, the value of x will be:

$x=2,\:x=-2$

5 0

3 years ago

Helppppppppppppppppp

BlackZzzverrR [31]

Answer:

Step-by-step explanation:

The top one is the third one the bottom one is the first one

6 0

3 years ago

Use properties of exponents to complete the equivalent expression. (Take a look at the image).

kondaur [170]

The exponent would b 15

U just gotta solve it than u get 3375 than look for the square root of that and it’s 15over15

6 0

3 years ago