Chapter 12 Sequences and Series - 12.2 Analyze Arithmetic Sequences and Series - 12.2 Exercises - Skill Practice - Page 807: 54

True

We know that the general formula of an arithmetic sequence is given by $a_n= a_1+(n-1) d$ Here, d = common difference Here, we have $b=a+d $ and $c=b+d$ Thus, $a+c=2a+2d=2(a+d)=2b$ Hence, the given statement is True.