Question

Which term Ap72,68,64,64,60,... is 0

Answer 1

Answer:

19

Step-by-step explanation:

An=a+(n-1)d

=> An=0,d=(-4),a=72,n=?

Putting in the equation.

=> 0=72+(n-1)(-4)

=> 72/4=n-1

=> 18= n-1

=> 19=n

so, 19th term will be 0 .

ans.

Answer 2

Answer:

Here in this A.P a=72 and d=-4

Given Tn =0

=> a+(n-1)d=0

=>72+(n-1)-4=0

=> -(n-1)4=-72

=> -(n-1)=-18

=> (n-1)=18

=> n=19

So 19th term of this A.P is 0

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