Senior one is the first stage when we enter senior high school. We should improve ourselves and study hard. And mathematics is also one of the important courses we must study. I have compiled a summary of five knowledge points that must be tested in senior one mathematics for everyone, hoping to help you! Summary of Five Knowledge Points of Compulsory Mathematics in Senior One: 1 Basic Properties of Difference Sequence (1) arithmetic progression with a tolerance of d, the sequence obtained by adding a number to each item is still arithmetic progression, and the tolerance is still d(2) arithmetic progression with a tolerance of d, and the sequence obtained by multiplying each item by a constant k is still arithmetic progression with a tolerance of KD. (3) If {a} and {b} are arithmetic progression, then {a b} and {ka+b}(k and b are nonzero constants) are also arithmetic progression. (4) For any m and n, there is a=a+(n-m)d in arithmetic progression. Especially when m= 1, the general formula of arithmetic progression is obtained, which is better. And l+k+p+... = m+n+r+... (the number of natural numbers on both sides is equal), then when {a} is arithmetic progression, there is: a+a+... = a+a+... [6] arithmetic progression with a tolerance of d, from which equidistant terms are taken out to form a new series. In arithmetic progression {a}, a-a = a-a = MD. (where m, k,) 8 In arithmetic progression, from the first term, each term (except the last term of a finite series) is the arithmetic average of its two terms. Levies when the tolerance is d >; 0, the number in arithmetic progression increases with the increase of the number of terms; When d < 0, the number in arithmetic progression decreases with the decrease of the number of terms; When d=0, the number in arithmetic progression is equal to a constant. ⑽ Let A, A and A be three terms in arithmetic progression, and the ratio of the distance difference between A and A, A and A =(≦- 1), then A =. (1) sequence {a} is arithmetic progression if and only if: the first n of sequence {a}. When the number of terms is (2n- 1)(n), S-S = A, = .3 If the series {a} is arithmetic progression, then S, S-S, S-S, ... still become arithmetic progression, if the sum of the first n terms of two arithmetic progression {a} and {b} is S, respectively. M), then s = (a-b). [6] In arithmetic progression {a}, it is a linear function of n, and all points (n,) are on the straight line y=x+(a-). Once, remember that the sum of the first n terms of arithmetic progression {a} is S.① If a>0, the tolerance is D.

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