Math 8

write an algebraic expression for the nth term of this sequence.
7, 11, 16, 22,...

I know what algebraic expression is.

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  1. note that the differences are 4,5,6
    Now, you know that 1+2+3+...+n = n(n+1)/2
    Your sequence is 7 + 4+5+6+...

    see what you can do with that

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