Question

if the second term of an ap 13 and 4th term 3.find the third term

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Answer 1

Answer:8

Step-by-step explanation:

third term = (second term+fourth term)/2

=(13+3)/2

=16/2

=8

Answer 2

Step-by-step explanation:

an= a +(n-1)d

a2=a+(2-1)d

13=a+d

a=13-d

a4= a+(4-1)d

3=a+3d

putting a=13-d

3=13-d+3d

3-13=2d

2d=10

d=5

a=13-5

a=8

a3= 8+(3-1)5

a3=8+2*5

a3=8+10

a3=18