anonymous
  • anonymous
I need help solving an=a1+(n-1)d and I'm suppose to solve for d. I need help please :)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
transpose a1 to left side.
jdoe0001
  • jdoe0001
hmmm, that's just plain simplification, I assume you're not doing sequences evaluations
phi
  • phi
The first thing to know is that "an" and "a1" are names and do not mean a times n or a times 1 an=a1+(n-1)d add -a1 to both sides an-a1 = a1-a1 + (n-1) d can you simplify the right side ?

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phi
  • phi
you should notice that a1 - a1 is 0 so you can simplify to an - a1 = (n-1) d now divide both sides by (n-1) can you do that ?
anonymous
  • anonymous
yes.
anonymous
  • anonymous
Give it a try.
anonymous
  • anonymous
got the answer thank u!
phi
  • phi
to divide draw a big line underneath both sides then write (n-1) under the line on both sides

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