Between 2 and 6 means the set is more than 2 and less than 6
x is the set
x>2 and x<6
2<x and x<6
2<x<6

it is wrong that they wrote
2>x>6, means x is les than 2 and greater than 6
no solution

correct way is 2<x<6

7 0

3 years ago

If f(x) = 6x - 4. what is f(x) when x = 8?

Valentin [98]

Answer:

Step-by-step explanation:

* means multiply

put 8 where the x is

6 * 8 - 4

48 - 4

7 0

3 years ago

S= (b-bg)/(1-r) please help me solve for b

Montano1993 [528]

The answer to the question

4 0

4 years ago

Find a power series representation of e^x sin(x)

liberstina [14]

The Taylor series is defined by:
$f(x) = \sum \frac{f^n (a)}{n!} (x-a)^n$

Let a = 0.
Then its just a matter of finding derivatives and determining how many terms is needed for the series.

Derivatives can be found using product rule:
$f^n (x) = e^x g^{n-1} (x) + e^x g^n (x) \\ g^0 (x) = sin x$

Do this successively to n = 6.
$f^1 (x) = e^x (sinx +cos x) \\ f^2 (x) = e^x (2cos x) \\ f^3 (x) = e^x(2cos x - 2sin x) \\ f^4 (x) = e^x (-4 sin x) \\ f^5 (x) = e^x(-4sinx -4cos x) \\ f^6(x) = e^x(-8cos x)$

Plug in x=0 and sub into taylor series:
$e^x sin x = x+x^2 +\frac{x^3}{3} -\frac{x^5}{30}-\frac{x^6}{90}...$

If more terms are needed simply continue the recursive derivative formula and add to taylor series.

6 0

3 years ago