Question

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Which rank of class 76, 72,68 ...................will be 0 ?


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Answer 1

Heya !!!



AP = 76 , 72 , 68 ....



Here,


First term ( A) = 76


Common Difference (D) = -4


Tn = 0



A + ( N -1) × D = 0



76 + ( N -1) × -4 = 0



76 - 4N + 4 = 0




-4N + 80 = 0




-4N = -80


N = -80/-4




N = 20



Hence,



20 term of the given AP will be equal to 0.





★ HOPE IT WILL HELP YOU ★

Answer 2

Hey Mate

your answer is ---

Given, sequence are 76,72,68.......0

now, 72-76 = -4 & 68-72= -4

so, given sequence are in AP with first term a = 76 & common difference d = -4

Let, nth term will be 0

therefore,

an = a+(n-1)d

=> 0 = 76+(n-1)-4

=> n-1 = -76/-4

=> n-1 = 19

=> n = 19+1

=> n = 20


hence, 20th rank of class 76,72,68 ...
will be 0


Hope it help you :D