MHB Arithmetic Progression: Finding the First Term and Common Difference

Crystalong876
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The sum of the first 100 terms of an arithmetic progression is 15050; the first, third and eleventh terms of this progression are three consecutive terms of a geometric progression. Find the first term, a and the non-zero common difference, d, of the arithmetic progression.
 
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Hello and welcome to MHB, Crystalong876! :D

There are several issues of which I need to make you aware:

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So, given these rules and policies at MHB (the complete list can be found http://mathhelpboards.com/rules/), I have moved your first thread here, given it a useful title and then deleted the 3 duplicate threads. Whew! (Sweating)

With that done, can you post what you have tried so far so our helpers know where you are stuck and can best guide you?
 
Crystalong876 said:
The sum of the first 100 terms of an arithmetic progression is 15050; the first, third and eleventh terms of this progression are three consecutive terms of a geometric progression. Find the first term, a and the non-zero common difference, d, of the arithmetic progression.
Are you able to solve this equation for a:

am = a + 2d

a = ?

If not, you'll need classroom help to solve your problem...
 
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