Shanghai Sunland Industrial Co., Ltd is the top manufacturer of Personal Protect Equipment in China, with 20 years’experience. We are the Chinese government appointed manufacturer for government power,personal protection equipment , medical instruments,construction industry, etc. All the products get the CE, ANSI and related Industry Certificates. All our safety helmets use the top-quality raw material without any recycling material.

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We provide exclusive customization of the products logo, using advanced printing technology and technology, not suitable for fading, solid and firm, scratch-proof and anti-smashing, and suitable for various scenes such as construction, mining, warehouse, inspection, etc. Our goal is to satisfy your needs. Demand, do your best.

Professional team work and production line which can make nice quality in short time.

We abide by the privacy policy and human rights, follow the business order, do our utmost to provide you with a fair and secure trading environment, and look forward to your customers coming to cooperate with us, openly mind and trade with customers, promote common development, and work together for a win-win situation.

The professional team provides 24 * 7 after-sales service for you, which can help you solve any problems

Consultation hotline：0086-15900663312

Email：sale@sunlandsafety.com

Address：No. 3888, Hutai Road, Baoshan District, Shanghai, China

The exponent on the variable portion of a term tells you the "degree" of that term. For instance, the power on the variable ,x, in the leading term in the above polynomial is 2; this means that the leading term is a "second-degree" term, or "a term of degree two".The second term …

Let f be a function with domain D in R, the real numbers, and D is an open set in R. Then the derivative of f at the point c is defined as: f'(c) =lim as ,x,-> c of the difference quotient [f(,x,)-f(c)]/[,x,-c] If that limit exits, the function is ,called, differentiable at c.

The slope-intercept form of a linear equation is y = mx + b. In the equation, ,x, and y are the variables. The numbers m and b give the slope of the line (m) and the value of y when ,x, is 0 (b). The value of y when ,x, is 0 is ,called, the y-intercept because (0,y) is the point at which the line crosses the y axis.

Algebraic Expression 1. Algebraic Expression: Any expression that contains letters, numbers and basic operation signs +, --, × and ÷ is ,called, an Algebraic Expression. Examples: 2x, 5y, -20p, 3x + 5y, -9q/8 are a few examples of algebraic expressions.. In the above examples, ,x,, y, p, q are the letters and 2, 5, -20, -9/8 are the numbers, while the symbols: -, +, ÷ are the basic (fundamental ...

A function ƒ : A→B is ,called, an onto function if the range of ƒ is B. Examples on onto function Example 1: Let A = {1, 2, 3}, B = {4, 5} and let f = {(1, 4), (2, 5), (3, 5)}. Show …

The horizontal axis is ,called, the ,x,-axis. The vertical axis is ,called, the y-axis. The point where the ,x,-axis and y-axis intersect is ,called, the origin. The numbers on a coordinate grid are used to locate points. Each point can be identified by an ordered pair of numbers; that is, a number on the ,x,-axis ,called, an ,x,-coordinate, and a number on ...

Integration, ,in mathematics,, technique of finding a function g (,x,) the derivative of which, Dg (,x,), is equal to a given function f (,x,). This is indicated by the integral sign “∫,” as in ∫ f (,x,), usually ,called, the indefinite integral of the function. The symbol dx represents an infinitesimal displacement along ,x,; thus…

The composite functions of higher ,math, often use h(,x,) and g(,x,), in combination,,defining which comes first, and which is second. The substitution is bad enough, but using y's would make it worse.. In summary, feel free to immediately use "y =" instead of "h(,x,)", if it clarified the problem.

Matrix, a set of numbers arranged in rows and columns so as to form a rectangular array. The numbers are ,called, the elements, or entries, of the matrix. Matrices have wide applications in engineering, physics, economics, and statistics as well as in various branches of ,mathematics,. Historically, it

which makes the function-argument status of ,x, clear, and thereby implicitly the constant status of a, b and c. Since c occurs in a term that is a constant function of ,x,, it is ,called, the constant term.: 18. Specific branches and applications of ,mathematics, usually have specific naming conventions for variables.