Given that x = 2 / 2 root sign 20 minus 4, find x square + 1 / 2 x square?

X = (√ 20-4) / 2 = √ 5-2; X? + 1 / x? = (x + 1 / x)? - 2 = (√ 5-2 + 1 / (√ 5-2))? - 2 = (√ 5-2 + √ 5 + 2) - 2 = 20-2 = 18; if you don't understand this question, you can follow it up if you are satisfied. If you have any other questions, please click on me for help

Function y = lgsinx+ The domain of 16 − X2 is______ .

Function y = lgsinx+
The domain of 16 − x2 satisfies
sinx＞0
16−x2≥0 ，
The solution
2kπ＜x＜2kπ+π，k∈Z
−4≤x≤4 ，
ν - x ＜π
So the answer is: {x | - 4 ≤ x ＜ - π or 0 ＜ x ＜ π}

-The square of 3 minus (minus half) minus the third power minus one minus the root sign three plus the root twenty-seven

(-3)^2-(-1/2)^-3-|1-√3|+√27
=9-(-2)^3-(√3-1)+3√3
=9+8+1+3√3-√3
=18+2√3

Given that the half power of a plus the negative half power of a is equal to the root 5, how much is the square of a minus the negative 2 power of a

The square of √ a + 1 / √ a = √ 5 is a + 1 / a = 3, and then the square of both sides is a 2 + A ^ (- 2) = 7, so (A-1 / a) ^ 2 = a? - 2 + A ^ (- 2) = 5
Therefore, A-1 / a = + or - √ 5, so a? - A ^ (- 2) = (a + 1 / a) (A-1 / a) = + or - 3 √ 5

Let's know that x half power plus x minus half power equals two, and X is greater than zero. Find the root sign of x-half plus the root sign of x-minus-half-power equals to Two of you have already answered, but I think you are wrong. I have already started to do the same thing. Square really can't get the front + 2?

This is not the typical complete square of junior high school (x-1 / x) ^ 2 = 0, x = 1 / x, x = {x | x = 1 or x = - 1}
10> So x = 1

What's the minus two-thirds power of 2? What's the minus half power of (3 + 2 times the root sign 2)

Is it the simplest root form
One
2^(-2/3)=1/2^(2/3)=1/³√2²=1/³√4=(³√2)/2
Two
﹙3+2√2﹚^(-1/2)
=[(1+√2)²]^(-1/2)
=(1+√2)^(-1)
=1/(√2+1)
=√2-1

The meaning of the square of 5, the half power of 5, the negative half power of 5, the root of 5 and the power of 2 For example: the square of 5 = 25, meaning: two 5 times 5x5 = 25 What's the other meaning?

The square of 5:
Denotes the multiplication of two 5's
1 / 2 of 5:
This is to find a non negative number so that its square is 5
To the minus half power of 5:
To find the arithmetic square root of 5, and then find its reciprocal
The root of 5 is to the power of 2
This is an irrational power of a number
Denotes that a sequence of rational numbers Q1, Q2,..., QN... Approximates the radical 2
The number that is approximated by the QN power of 5

What is the absolute value of root 2 minus root 3 plus root 3 minus 2 plus 2 minus root 5? What is the absolute value of root 6 minus root 2 plus 1 minus the absolute value of root 2 plus root 6 minus 3? Two questions

1、 Cube root 2 minus absolute value of root 3 plus 2 times root 2 (accurate to 0.01) 2. Cube root 6 times PI (π) divided by root 5 (reserved) Online, etc~

It's OK to look up the table without any skills

Absolute value of root 5 minus 2

|The absolute value of a positive number is itself

Given that x = 2 / 2 root sign 20 minus 4, find x square + 1 / 2 x square?