Question

Check whether the following sequence is an AP or not:
$-1.2,-3.2,-5.2,-7.2$...

Answer 1

$-3.2-(-1.2)=-2$

$-5.2-\left(3.2\right)=-2$

$-7.2-(-5.2)=-2$

Since the difference between consecutive terms is constant,

Therefore, the given sequence is in $A.P.$