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2023 Single-stroke Mathematics Examination Scope
Algebra part of single recruit math exam;

1. set, simple logic test content: set, subset, intersection, complement set, intersection and union.

2. permutation and combination: permutation order number formula, combination number formula, binomial theorem expansion.

3. Probability, probability of random events and probability of possible events.

Geometry part of a single math exam;

1. Examination contents of plane vector: vector, addition and subtraction of vector, product of real number and vector, coordinate representation of plane vector, bisector of line segment, quantitative product of plane vector, distance and translation between two points in plane.

2. Function, mapping, monotonicity and parity of function, inverse function and image relationship, logarithmic operation and logarithmic function.

3. Trigonometric functions, trigonometric functions, sine and cosine functions, tangent functions and their images in the unit circle, sine theorem and cosine theorem.

It is strongly recommended that two straight lines are perpendicular or parallel to each other:

The straight line l1:a1x+b1y+c1= 0 The straight line L2: A2X+B2Y+C2 = 0.

If it is vertical: (necessary and sufficient condition) A1A2+B1B2 = 0;

If they are parallel: (necessary and sufficient conditions) a 1b2=a2b 1 and a 1c2≠a2c 1 [This condition is to prevent two straight lines from overlapping].

Note: the above two formulas avoid the trouble of whether the slope exists or not, and are directly killed!