X1 = [x 0] in MATLAB

X1 = [x 0] in MATLAB

The X variable here should be a row vector! If it is, it is a connection matrix, that is, X connects two zeros to x1, so x is a vector of length (x) + 2!

F = 2 * 365 * x (2) / X (1) + 2 * 3.14 * x (1) ^ 2 * 2 * x (2)

Lingo
min=2*365*x2/x1+2*3.14*x1^2*2*x2;
x1

If the hypotenuse of a right triangle is 2cm longer than one right side and 6cm longer than the other right side, the length of its hypotenuse ()
A. 4cmB. 8cmC. 10cmD. 12cm

Let the hypotenuse be X. then according to the Pythagorean theorem, we can get: (X-2) 2 + 62 = X2, the solution is: x = 10, so the length of hypotenuse is 10cm

() () River, fill in adjectives. Antonym of attack, antonym of reform, antonym of heaviness, antonym of hope

A rough River,
Attack (Defense)
Reform (feudalism)
Heavy (relaxed)
Hope (disappointment)
I am not talented, according to their knowledge to summarize the answer. Hope to help you

A problem about sine and cosine theorem
It is known that in the triangle ABC, Sina: SINB: sinc = 3:5:7, then what is the maximum angle of the triangle?
a.135° b.90° c.120° d.150°

a: Sina = B: SINB = C: sinc, so from Sina: SINB: sinc = 3:5:7 we get a: B: C = 3:5:7, let a = 3k, then B = 5K, C = 7K (k is a constant). According to the cosine theorem, we can calculate the cos values of three angles. Cosa = [(5K) & sup2; + (7K) & sup2; - (3K) & sup2;] / 2 * 5K * 7K = 13 / 14cosb = [(3K) & sup2;]

The usage of the verb ing
At NTU,it was 10 in 2002,doubling the number from a year before.
What is the role of doubling in this sentence?
What is the specific sentence element in this sentence? It needs grammatical analysis

Double the number from a year before is an adverbial adjunct. In 2002, it is 10, which is twice that of the previous year

Notes on the introduction to the basic principles of Marxism (1000 words)

The main content of Marxism is Marxist philosophy and scientific socialism. Marxist philosophy is a scientific world outlook and methodology. Philosophy is the basic problem of philosophy. Philosophy is the theoretical form of world outlook. The relationship between thinking and existence is the basic problem of philosophy

In the polar coordinate system, the polar coordinate equation of the line passing through the point (2,0) and tangent to the circle P = 4sin θ is___ .
Question: does PCOS θ = 0 conform to the meaning of the question?
What is the correct answer? One or two?

The circle is tangent to the polar axis, the center of the circle is (2, Pai / 2), and the radius is 2
PCOS θ = 0
The other is PSIN θ = 0, which coincides with the polar axis

Judgement theorem of parallel line on one side of triangle

If a line is divided into two sides of a triangle, the line is parallel to one side of the triangle

What's the difference between sports shops and sports shops?

Sports shoes
Sport shoes is a wrong expression
Note: sport must be plural when it is used as attribute
Sports news
Sports car
Sports Center