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o-na [289]
3 years ago
11

2. What step did Mikayla do wrong when she solved this

Mathematics
2 answers:
Lunna [17]3 years ago
5 0

Mikayla subtracted 4 from both sides in the beginning when she should've added it to both sides to cancel it out on the right. the correct answer should actually be x=1

Eduardwww [97]3 years ago
3 0

Answer:

Mikayla subracted 4 from both sides, not add. She was supposed to add so that the -4 can cancel out.

The correct answer would be x=1

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Find the general term of {a_n}
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From the given recurrence, it follows that

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a_{n+1} = 2^na_1 + \displaystyle \sum_{k=0}^{n-1}2^k

(Notice how the exponent on the 2 and the subscript of <em>a</em> in the first term add up to <em>n</em> + 1.)

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Multiply both sides by 2 :

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