1*2+2*3+3*4+4*5+5*6+6*7+? +n (n+1) = n (n+1) (n+2)/3: common derivative formula: 1.y=c(c is a constant) y' = 0,2.y = xny' = NX (. y=lnx y'= 1/x，5.y=sinx y'=cosx，6.y=cosx y'=-sinx，7 . y = tanx y'= 1/cos^2x,8.y=cotx y'=- 1/sin^2x, 9.y=arcsinx y'= 1/√ 1-x^2， 10 . y = arc cosx y'=- 1/√ 1-x^2, 1 1.y=arctanx y'= 1/ 1+x^2, 12.y=arccotxy'=- 1/ 1+x^2。

The senior high school entrance examination, that is, the ordinary high school academic level examination. It is an examination organized and implemented by the provincial education administrative department according to the national curriculum standards for ordinary senior high schools and educational examination regulations. It is an important system to ensure the quality of education and teaching by mainly measuring the degree to which students meet the learning requirements stipulated by the state. Examination results are an important basis for students to graduate and further their studies. The implementation of the academic proficiency test is conducive to promoting students to study each course carefully and avoiding serious partiality; It is helpful for schools to accurately grasp students' learning situation and improve teaching management; It is conducive to the scientific selection of students suitable for school characteristics and professional requirements in colleges and universities, and promotes the effective connection between high school and college personnel training.