Geometry progression

[Jeff ortis]

[]When a GP has a first term of 29 and common ratio of 2. What will be the smallest number of terms needed for the sum to be over 1000000?

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[Steven G]

What happened to the -1 in 2^n -1???

 

[Dr.Peterson]

When a GP has a first term of 29 and common ratio of 2. What will be the smallest number of terms needed for the sum to be over 1000000?

Check those logs. I get a much smaller number, and can't see how you got yours. (Also check your answer at the end, by evaluating that expression for S_n!)

But otherwise, you are mostly doing the right things.

By the way, this belongs under algebra, not geometry; it's called a geometric progression because such things first arose in connection with geometry.