Ex- find the 20th value of the followingsequence 1,4,7,10.....Solution :a₁ = 1n = 20d=3an = a₁ + (n − 1) x d-= 1+ (201) x 3 = 58series• Series is the sum of a sequence if {a}-o is asequence then the associated series isΣan = ao+a₁ + a₂ + az +...i=0EX :find the nth rule of the sequence set number1- 1,-1,1,-1,1,-1,........2- 2,1/4,1/8,1/16,1/32,....3- -4,5,-6,7,-8,9,-10,.....

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Ex- find the 20th value of the following sequence 1,4,7,10..... Solution : a₁ = 1 n = 20 d=3 an = a₁ + (n − 1) x d - = 1+ (201) x 3 = 58 series • Series is the sum of a sequence if {a}=0 is a sequence then the associated series is Σ an = ao+a₁ + a₂ + az +... i=0 EX:find the nth rule of the sequence set number 1- 1,-1,1,-1,1,-1,........ 2- 2,1/4,1/8,1/16,1/32,.... 3- -4,5,-6,7,-8,9,-10,.....