Question

first term of an arithmetic sequence is 10 and it's common difference is 3,then what is the first three terms of this sequence? verify whether 100 is a term of this sequence?​

Answer 1

Answer:

10,13,16

Step-by-step explanation:

first term is10

then 2nd is 10+3=13

so,on 3rd term is 10+{2×3}=16

because common difference is 3

due to an=a1+{n-1}d where a is 10 and d is3

100=10+{n-1}3

100-10=3n-3

90-3 =3n

87÷3=n

n=29

so 100 is 29th term of this ap