Find a formula for an for the arithmetic sequence. a2 = 93, a6 = 65 any help would be greatly appreciated. thank you.
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Originally Posted by thepride Find a formula for an for the arithmetic sequence. a2 = 93, a6 = 65 any help would be greatly appreciated. thank you. what is the formula for the nth term of an arithmetic sequence?
Originally Posted by skeeter what is the formula for the nth term of an arithmetic sequence? im pretty sure its an = dn + c but what do i do??? i missed classed and my professor doesnt work on the weekends?
Originally Posted by thepride im pretty sure its an = dn + c better look it up and make sure ... you'll need it to solve this problem.
Originally Posted by skeeter better look it up and make sure ... you'll need it to solve this problem. ok i found this an= dn + c this is linear form and i also found this an= a1 +(n -1)d this is alternative form. hope this helps.
Last edited by flexus; September 26th 2009 at 12:29 PM. Reason: add
Originally Posted by flexus ok i found this an= dn + c this is linear form and i also found this an= a1 +(n -1)d this is alternative form. hope this helps. two people involved w/ this problem? ... *** ... *** you have two equations (***) with two unknowns ... solve the system for and
Originally Posted by skeeter two people involved w/ this problem? ... *** ... *** you have two equations (***) with two unknowns ... solve the system for and no i was just helping him/her out.
good luck trying to solve that one thepride. i have no clue.
Last edited by flexus; September 26th 2009 at 01:12 PM. Reason: wrong post
These are two linear equations so should be relatively simple to solve. Already I can see that the common difference will be negative because Hint: is equal to ------------- I get
Last edited by e^(i*pi); September 26th 2009 at 01:57 PM. Reason: Put in final answer to aid the OP
Originally Posted by e^(i*pi) These are two linear equations so should be relatively simple to solve. Already I can see that the common difference will be negative because Hint: is equal to ------------- I get thats not right i check the back of the book and the answer is An= -7n+107 can someone help me understand this problem???
Originally Posted by thepride thats not right i check the back of the book and the answer is An= -7n+107 can someone help me understand this problem??? HI we know that ---- 1 and ----2 Then solving the simultaneous equatino would give and =the given answer .
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