can anyone help me with this?
I'm not sure what to do, my class just started learning this.
The first term of an arithmetic series is 9, the last term is 147, and the sum is 1872. Find the number of terms and the common difference.

Question

can anyone help me with this?
I'm not sure what to do, my class just started learning this.
The first term of an arithmetic series is 9, the last term is 147, and the sum is 1872. Find the number of terms and the common difference.

fibonaccichick666 · Answer

It's been a while for me, if no one helps I can figure it out. Here is a nice reference in the meantime. If you like to read more http://www.purplemath.com/modules/series3.htm Khan academy tutorial videos https://www.khanacademy.org/math/integral-calculus/sequences_series_approx_calc/calculus-series/v/formula-for-arithmetic-series

triciaal · Answer

so did you get n = 24?

triciaal · Answer

hello?

anonymous · Answer

no, i couldn't quite figure it out.

triciaal · Answer

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