(2 + 1) × (2's square + 1) × (2's fourth power + 1) - 2's eighth power

(2 + 1) × (2's square + 1) × (2's fourth power + 1) - 2's eighth power

The original formula = (2-1) (2 + 1) (2 & # 178; + 1) (4 power of 2 + 1) - 8 power of 2
=(2 & # 178; - 1) (2 & # 178; + 1) (4 power of 2 + 1) - 8 power of 2
=(4 power of 2-1) (4 power of 2 + 1) - 8 power of 2
=The eighth power of 2 - the eighth power of 1-2
=-1

Calculation: (2's square + 1) (2's fourth power + 1) (2's eighth power + 1) (32 of 2 + 1)

(square of 2 + 1) (4th power of 2 + 1) (8th power of 2 + 1) (32 power of 2 + 1) = (2-1) (2 + 1) (square of 2 + 1) (4th power of 2 + 1) (8th power of 2 + 1) (32 power of 2 + 1) / 3 = (2 ^ 2-1) (square of 2 + 1) (4 power of 2 + 1) (8 power of 2 + 1) (32 of 2 + 1) / 3 = (2 ^ 32-1) (2 ^ 32 + 1) /

【1】 Δ ABC is a triangular open space, ab = AC = 20cm, ∠ B = 15 ° is known, now we need to lay a piece of turf on it, it is known that it is 150 yuan per square meter, so how much is it to lay this piece of land?
【2】 There is a reef within 1 nautical mile around an island c. a ship sails along the due north direction. It is measured that the island is 15 ° n by e at a. it continues to sail northward for 3 nautical miles to reach B. It is measured that the island is 30 ° n by e at B. if the ship does not change its course, is there any danger of hitting the reef?
【3】 Analyze the following sentences, among which ()
1. An equilateral triangle has three axes of symmetry
2. Parallelogram is an axisymmetric figure
3. The two figures which are symmetrical about a line must be on both sides of the symmetrical axis
4. The angle between the height of one waist and the bottom of an isosceles triangle with a vertex angle of 20 ° is 40 °
5. Two equilateral triangles with one equal side must be equal
A. 2 B.3 C.4 d.5
Point out which is right and which is wrong, and why

A two digit number, minus three times the sum of its digits, results in 23. The quotient of this two digit number divided by the sum of its digits is 5, and the remainder is 1. What are these two digits?

Let X be the ten digit number of this two digit number, and y be the number of each digit. According to the meaning of the question, we get 10x + y − 3 (x + y) = 2310 x + y = 5 (x + y) + 1, and the solution is x = 5Y = 6, so this two digit number is 56. A: this two digit number is 56