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anonymous
 one year ago
Which rule will find the nth term of an arithmetic sequence with a rate of increase equal to 1/2 and a6 = 18?
a.) an = 30 + n/2
b.) an= 7+ n/2
c.) an= 15 n/n
d.) an= 15+ n/2
Thank you for your help! ^_^ xoxo
anonymous
 one year ago
Which rule will find the nth term of an arithmetic sequence with a rate of increase equal to 1/2 and a6 = 18? a.) an = 30 + n/2 b.) an= 7+ n/2 c.) an= 15 n/n d.) an= 15+ n/2 Thank you for your help! ^_^ xoxo

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ZeHanz
 one year ago
Best ResponseYou've already chosen the best response.1Possible first step: set n=6 in these formulas to filter out the wrong ones.

rishavraj
 one year ago
Best ResponseYou've already chosen the best response.2\[a_n = a_1 + (n  1)d\] u r having a_6 find a_1 and plug it in the above equation...... and also the way @ZeHanz said would be far easy....

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0how do I put the an on mathway.com? Lol I don't know how! ;;

ZeHanz
 one year ago
Best ResponseYou've already chosen the best response.1Not sure what you mean... If I set n=6 in the first one, I get: 30 + 6/2 = 30+3=33, so wrong. Only if two of the formulas give you 18 as an aswer, you have to do extra work (or thinking...)
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