Answer:
Option D
Yes 0.4
Explanation:
A sequence is said to be arithmetic if there is a pattern as
nth term is got by adding d to n-1th term.
d = common difference
The sequence will look like
a, a+d,a+2d, a+3d,......
where I term= a and each time d is added to get the next term.
Our given sequence is
-0.3, 0.1, 0.5, 0.9, …
Let us find difference between Ii and I term
=0.1-(-0.3) = 0.4
Similarly iii term - ii term
=0.5-0.1 =0.4
and iv term - iii term = 0.9-0.5 = 0.4
Hence confirmed that this is an arithmetic sequence with I term =-0.3 and common difference = 0.4