Sara (sonrosado) wrote in gcsesciencehelp,
Sara
sonrosado
gcsesciencehelp

Simplifying.. actually more complicated?

Hello!
I've been given this formula to simplify:

nth term = a (n-1) d + 1/2 (n-1)(n-2)c

I've roped all my friends into helping me with this...! Yet my teacher has looked over them and declared all their attempts as incorrect!
He hints that :
1/2(n squared - 3n+2)c

(but doesn't this actually make the formula more complicated?)
could anybody please help me?

thank you so much

Sara
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