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Arte-miy333 [17]
2 years ago
7

Is this correct? If not plz get answers 25points!!!

Mathematics
1 answer:
katen-ka-za [31]2 years ago
8 0

That is correct.

Sqrt 5 x sqrt20

Apply the radical rule to get sqrt( 5 x 20)

Simplify to get sqrt(100)

Sqrt(100) = 10

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Will give 25 points and brainliest answer if correct
Norma-Jean [14]
Let d be the common difference between terms in the sequence \{a_n\}_{n\ge1}. Then

a_{19}=-58
a_{20}=a_{19}+d
a_{21}=a_{19}+2d
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The first term in the sequence, a_1, satisfies

a_2=a_1+d
a_3=a_1+2d
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...
a_{19}=a_1+18d
\implies-58=a_1+18(-53)\implies a_1=896

So the explicit formula for the n-th term in the sequence is

a_n=a_1+(n-1)d\implies a_n=896-53(n-1)
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