SOLUTION: How would you figure out {{{sum( 2(5^n), n=0, 3 )}}}

Question 109973: How would you figure out
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
figure out sum( 2(5^n), n=0, 3 )
n=0: 2*5^0 = 2*1 = 2
n=1: 2*5^1 = 2*5 =10
n=2: 2*5^2 = 2*25=50
n=3: 2*5^3 = 2*125=250
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Adding these you get 312
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Cheers,
Stan H.
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