Question

the second term of the arithemetic sequence is 18 and fourth term 32. find the third and first term​

Answer 1

Step-by-step explanation:

a+d=18 (given) eq-1

a+3d=32 (given) eq-2

On subtracting eq-1 from eq-2,we get

a+3d-(a+d)=32-18

a+3d-a-d=14

2d=14

d=7

putting value of d in eq-1

a+d=18

a+7=18

a=18-7

a=11

putting values of a and d in a+2d

11+2(7)

25