The difference between -0.3 and 0.1 is 0.4.
0.1 + 0.4 = 0.5
0.5 + 0.4 = 0.9
I hope this helps!
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
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
huh? im pretty sure it is in 199
a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.