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# [MATH THEORY] rth term vs nth term

• Difference between rth term and nth term ?

Or are they simply just dummy variables?

• Hi,

need to share the context, the subject/topic, the level, the question as well.

If unsure, please refer to posting guidelines:

http://sgforums.com/forums/2297/topics/354680

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• Originally posted by eagle:

Hi,

need to share the context, the subject/topic, the level, the question as well.

If unsure, please refer to posting guidelines:

http://sgforums.com/forums/2297/topics/354680

Hi eagle,

I believe it's just Math theory, a math theory question in general,

Hence question and context might be just, mathematics, but i think , perhaps SG-Cambridge A level H2/H3 mathematics. I hypothesise that the gentleman above came across this rth and nth term at the 'sequence and series' , or maclaurin's series and binomial expansion chapters.

Hmm, my conjecture would be, (im only guessing, dont hold my conjecture too credible) , rth term is general term, nth term is a particular term in the series?

Perhaps you could post your math theory question here : http://math.stackexchange.com , i believe there are many other forums available as well

• Hi sunnyhigh,

thank you for sharing.

Depending on the context, the nth term could be a particular term, or it could be a general term. It really depends on the question.

For example, the sum of all terms of a sequence (from in terms of r, to in terms of n) could also be the general term of another different sequence. In this scenario, rth and nth might be considered as "dummy variables".

Yet for memorized formulas, it might be different. Without a proper context, I wouldn't want to answer the question as it might confuse the student further.

The question posted was too generic.

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