|If x + Y-1 | and | X-Y + 3 | are opposite numbers, then the value of (x + y) & sup2; & ordm; & sup1; & sup1; is?

|If x + Y-1 | and | X-Y + 3 | are opposite numbers, then the value of (x + y) & sup2; & ordm; & sup1; & sup1; is?

Because | x + Y-1 | and | X-Y + 3 | are opposite numbers
So | x + Y-1 | = 0, | X-Y + 3 | = 0
And X + Y-1 = 0, X-Y + 3 = 0
So x = - 1, y = 2
So (x + y) & sup2; & ordm; & sup1; & sup1; = (- 1 + 2) & sup2; & ordm; & sup1; & sup1; = 1
x=-1,y=2,(X+Y)^2011=1
One
If x = 1 is the solution of the equation mx-n + 1 = a, find the value of (m-n-a) & sup2; & ordm; & sup1; & sup2
Take x = 1 into the equation
m-n+1=a
m-n-a=-1
Because the even power of minus one is one
So (m-n-a) ^ 2012 = 1
1. Questioning: process
What degree of COS is equal to 0? Besides cos 0? = 0, what else?
K π + π / 2, cos0 ° = 1
Divide the 5-meter-long rope into 7 parts, each part is a fraction of the total length, each part is a fraction of 1 meter, a fraction of several meters, a fraction of five meters
Each segment is equal to 1 / 7 of the total length
Each section is 1 m = 5 △ 7 = 5 / 7; it is 5 / 7 M
It's 5 meters = 1 / 7 = 1 / 7
Divide the 5-meter-long rope into 7 parts, each part is full length (1 / 7), each part is 1-meter (5 / 7), each part is (5 / 7), each part is 5-meter (1 / 7)
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Why sin40 / 2sin20 = cos20
This is the angle doubling formula
sin2a=2sinacosa
Then sin2a / 2sina = cosa
Here a = 20 degrees
Can four seventh of a meter be regarded as a fraction of four meters or a fraction of one meter?
One seventh of a meter, four seventh of a meter
As one seventh of four meters, as four seventh of one meter
Find the value of 2sin20 + cos10 + tan20sin10, and the result is not approximate,
2sin20+cos10+tan20sin10
=2sin20+cos20cos10/cos20+sin20sin10/cos20
=2sin20+cos(20-10)/cos20
=2sin20cos20/cos20+cos10/cos20
=(sin40+cos10)/cos20
=(cos50+cos10)/cos20
=2cos30cos20/cos20
=√3
5 kg rice is packed into 8 bags on average. How many parts of 5 kg is each bag? How many parts of 5 kg is each bag? How many parts of 5 kg is each bag?
How many kilos are five bags?
Each bag is one eighth of five kilograms
Each bag is five eighths of a kilogram
Five bags is five eighths of five kilograms, and it's 25 eighths of a kilogram
1/8 5/8 25/8
Evaluation: 2sin20 (unit is degree, also below) + cos10 + tan20sin10
My question has been answered. How can I delete it?
2sin20+cos10+tan20*sin10
=2sin20 + (cos10 + sin20sin10 / cos20) (in brackets)
=2sin20 + cos10 / cos20
=(sin40+cos10)/cos20
=(sin40 + sin80) / cos20 (sum difference product)
=2sin60cos20/cos20
=2sin60
=√3
The difference between two natural numbers is the same two digit number, and the product is the same three digit number. What are the two natural numbers?
15,37 idea: the same three digit number is a multiple of 111, and the same two digit number is a multiple of 11. To decompose the prime factor of 111: 111 = 3 × 37, the product of two numbers is 111 multiplied by a number from 1 to 9. This 37 should be one of two numbers, so the other number is 3 multiplied by a number from 1 to 9
37 15
Zero
15 and 37