Closed Linear sequences nth term

[powerpuffowl]

1+2+3+4+5+6+7+6+5+4+3+2+1= paturo naman ng pattern hahahahaha i know the answer gusto ko lang po makuha yung patter

 

[PHC-SchizOphRenia]

a1-(n-1)² yan yata Yun TS di ako sure eh

 

[powerpuffowl]

a1-(n-1)² yan yata Yun TS di ako sure eh

thanks po sir

 

[powerpuffowl]

a1-(n-1)² yan yata Yun TS di ako sure eh

sir pwede po pa elaborate kung pano nakuha yan hehehe