Which of the following values is a term in the arithmetic sequence defined by $u_1=4$ and $d=0.6$?

True or False: The general term of any arithmetic sequence $u_n=u_1+(n-1)d$ can be rearranged into the linear form $u_n=dn+c$, where $c$ is a constant equal to $u_1-d$.

True or False: In any arithmetic sequence $u_1,u_2,u_3,\dots$, the common difference $d$ is equal to $\frac{u_3-u_1}{2}$.

For the sequence $u_n=15+(n-1)7$, which of the following calculations correctly proves that 100 is NOT a term in the sequence?

True or False: If a sequence is defined by the rule $u_n=3n^2-2$, the sequence of differences between consecutive terms ($d_n=u_{n+1}-u_n$) forms an arithmetic sequence.