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Which expression represents the series 1+5+25+125+625
4 months ago
Q:
Which expression represents the series 1+5+25+125+625
Accepted Solution
A:
S=1+5+5²+5³+5⁴
5S=5+5²+5³+5⁴+5⁵
5S-S=4S=5⁵-1
The expression is 5⁵-1 (=3124)