Question

which term of series 3+6+9+12+.......is 115​

Answer 1

Answer:

hey mate here is your answer

Step-by-step explanation:

85

Answer 2

Answer:

hey mate there's your answer

given series 3+6+9+12+................ is in AP.

let the first term of AP be a1=3

second term of the AP be a2=6

and common difference be d

d=a2-a1

d=6-3

d=3

so common difference is d=3

we know that,

nth term of AP is,

an=a1+(n-1)d

115=3+(n-1)(3)

115-3=3n-3

112=3n-3

112+3=3n

3n=115

n=115/3

it is not an integer.

so 115 is not the term in given series.

hope it helps you......

Thank you!!