Question

1rst term of an arithmetic sequence is 11 and 3rd term is 19 what is the second term and what is the 4th term
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Answer 1

Step-by-step explanation:

First term = a=11

Third term = a3= a+2d= 19

put a= 11 and find d

11+2d= 19

2d=8

d = 4

so second term = a+d= 11+4= 15

4rth term = a+3d= 11+3(4)= 23