A cell phone provider offers a plan that costs $40 per month plus $0.10 per text message sent or received. A comparable plan cos
1 answer:
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Let
In order to prove this by induction, we first need to prove the base case, i.e. prove that P(1) is true:
So, the base case is ok. Now, we need to assume and prove
.
states that
Since we're assuming , we can substitute the sum of the first n terms with their expression:
Which terminates the proof, since we showed that
as required
Only two of them are the correct answers to this question.
