This is not a question, you will just encode this thankyouuuu

PS: start from one then a,b then two

11:46 Q N 7 f . 4 . a ) .A 3,7, 11 15, 19,. . The given sequence is an arithmetic sequence , because difference between any two successive terms is constant. For instant + 7- 3 = 4 11- 7= 4 15 - 13 = 4 19 - 15 =4 -. Let first term be dented my a1 . and Beend' team by a2 in and similarly rith term by an . The difference between fun successive terms bealled demonon : difference , and is devote 92 = a, tod 93 = 92td = anta ta = 9, +2d ay = atd = atadtd's q, +3d 1 an = a, + (n-1)d 9 1 = 3 d = 4 an 3 + 10- 0)4 Explicit formula - an= 3+4 (0-1 )11:46 8 4 f . 2 0 7: all .1 116 (by - 12 / 12, - 12, 12, .-12,. The given sequence is a geemetric sequence . Because , each term can be " found out by oneel toplying the previous teron by a fixed number . For example : " Ist team 60 - 12 . 2nd term Is 12 , which s : basically - 12X - 1 = 12 3ed term is -12 , which s basically and term x - 1 . = 12X-1= =12 The fixed number with which the previous term is to be multiplied is called common ratio , and is devoted by 92. 9, = - 12 92 = 12 92:= -12 NOW , 92 = 9, x2 as = Q 2 x 1 = 9, x 12 94 = 93 X 2 = 91 X23 an -1 x 2 = a , x92 1 an = 9, xEnd . Putting values,4 9, = -12 72= -1 an = -12 x ( - 1)7-1 Explicit formula: an = - 12 x ( - 1)2. 3, 7, 11, 15/ 19 . . The sequence is arithmetic sequence. Q1 = 3 d = 4 an = ait m-Dd an = 3+4 ( m- 1 ) n = 37 37th term=. agg = 3+ 4 (37- 1) = 3+ 4x36 = 147 Thes, 37th term b 147