Answer:
Sandra bought 5 erasers,
Step-by-step explanation:
The third equation will help Johnny
18 is 75! this is the answer to 18
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
Since p is an obtuse angle
& that it's between two acute angles