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hi i'm Robyn and i'm 13, i am super confused with how you find the nth term with a changing difference, i can totally do it without the changing difference but not with. Especially the formula throws me:
nth term= a+(n-1)d+1/2(n-1)(n-2)c
how would i use it if the sequence was:
2, 4, 7, 11
and I needed to find the 5th term. pleeeeease help Robyn.
Pages: 1