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20/02/2018 · Learn All about Sum of AP Formula with Derivation - Arithmetic Progression Class 10 Maths Subscribe this Channel for Class 9 & Class 10 Maths & Physics Full Course - goo.gl/95gt1R Quadratic Equation Class 10. 20/07/2018 · the sum of n term of an AP is 3n^26n find the nth term of an AP - Duration: 11:01. R B Classes 5,087 views. 11:01. Learn The Quadratic Formula in 10 min - Duration: 19:55. TabletClass 232,230 views. 19:55. Arithmetic Progression - SUM - Derivation of Formula. i Determine the sum of first 35 terms of an A.P. if T 2 = 2, T 7 = 22. ii It the third term of an A.P. is 1 and 6th term is -11, find the sum of first 32 terms. iii If the first term of an A.P. is 2 and the sum of first 4 terms is equal to one fourth of the sum of the next five terms, find the sum of first 30 terms. Arithmetic Progression, AP Definition. Arithmetic Progression also called arithmetic sequence, is a sequence of numbers such that the difference between any two consecutive terms is constant. Each term therefore in an arithmetic progression will increase or decrease at.