Question

* LIC Check
A car going
at a constant speed in a straight line
check they are acceleration
line - Not
T​

Answer 1

Let the AP is (a-d), a, (a+d)

(a-d)+a+(a+d) =21

3a=21

a=7

(a-d)xax(a+d)=231

(axa-dxd) xa=231

(7×7-dxd)x7=231

(7×7-dxd)=231:7

(7x7-dxd)=33

dxd=49-33

dxd=16

d=4

Hence, the A. P. is 3, 7, 11.