Question

11th
term and 21th term of AP are 16 and 29
respectively than find
1st term and common differen ​

Answer 1

Answer:

1st term is 3

common difference is 1.3

Step-by-step explanation:

a+10d=16

a+20d=29

(-) (-) (-) then a get cancle

-10d= -13

d= -13/-10

d= 1.3

a+10d=16

a+10(1.3)=16

a+13=16

a= 16-13

a= 3