Question

Which term of the AP : 196,189, 182,175…..is the first negative term? plz explain

Answer 1

Answer:

AP : 196, 189, 182 , 175 , ....

a = 196 , d= -7

let -1 be the ist -ve term

an= a+(n-1)d

-1 = 196 + (n-1) (-7)

-1 = 196 -7n +7

-1 = 203 -7n

7n= 204

n= 204/7 = 29.14 , n cant be in decimal

so , we conclude that n= 30

an = a+(n-1)d

an= 196 + ( 30-1) (-7)

an= 196 -203

an = -7

so -7 is the ist negative term

Step-by-step explanation:

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