Question

First term 30,the sum of first three terms is 300

Answer 1

Answer:

subtract 30 from 300

Step-by-step explanation:

we get 270, it's sum of second and third term

now half of 270 is 135

first term is 30

second term is 135

third term is also 135

Answer 2

Answer:

First term 30 the sum of the first three terms in 300