Bob sets the price of the plants according to their height in inches. A plant that is 9.5 inches high costs $2.28 in his store.W
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We need to write the sum in this form:
So, we need to find an appropriate sequence, such that is the i-th even number.
You can easily check that this series is . In fact, you have
and so on. Finally, we have to observe that we want the first 50 elements of this sequence, since .
So, the sum can be written as