Remark
You'll see it a whole lot easier if you make a substitution so that it looks like something you have already seen
Solution
let y = x^2
x^4 = x^2 * x^2
x^4 = y * y
x^4 = y^2
Now the expression becomes
y^2 + 8 y - 9 = z
(y + 9)(y - 1) = z
Now put the x^2 back in.
(x^2 + 9) ( x^2 - 1) = z
x^2 - 1 becomes x + 1 and x - 1. At this level x^2 + 9 can't be factored.
Answer
(x^2 + 9) (x + 1)(x - 1)
Given:

To find:
The value of
.
Solution:
We know that,
...(i)
Where n is an integer.
We have,

Using (i), it can be written as


It is given that
.


Therefore, the value of the given function expression is
.
It is complementary and value of x is 20
Answer:
a). converges
b). diverges
c). converges
Step-by-step explanation:
{
} = {
}
Using radio test,
L = 
= 
= 
= 
= |r|
Therefore,
converges in |r| < 1
a). r = 1/5

This sequence is monotonically decreasing and bounded.
0 <
< 1
Hence, {
} converges.
b). r = 1
{
} = { n }
This sequence is monotonically increasing sequence which is not bounded.
Hence, {
} diverges.
c). r = 1/6

This sequence is monotonically decreasing and bounded.
0 <
< 1
Hence, {
} converges.
For |r| < 1, the
converges.
Answer:
7x = y + 37
Step-by-step explanation:
y = 7x - 9
Differentiating y with respect to x, we have as follows:
dy/dx = m = 7 ( where m is the slope)
Using the formula y - y1 = m(x - x1) to obtain the equation of line passing through point (4.-9)
y + 9 = 7(x - 4)
y + 9 = 7x - 28
∴ 7x = y + 37