# Sequences

• Aug 8th 2010, 09:02 PM
pletchera
Sequences
Write the nth term of the following sequence in terms of the first term of the sequence.
1, 8, 15, 22, . . .

Write the nth term of the following sequence in terms of the first term of the sequence.
10, 20, 40, . . .

Write the nth term of the following sequence in terms of the first term of the sequence.
2, -4, 8, -16, . . .
• Aug 8th 2010, 09:39 PM
Wilmer
Quote:

Originally Posted by pletchera
Write the nth term of the following sequence in terms of the first term of the sequence.
1, 8, 15, 22, . . .
1 + 7(n - 1)

Write the nth term of the following sequence in terms of the first term of the sequence.
10, 20, 40, . . .
10 * 2^(n - 1)

Write the nth term of the following sequence in terms of the first term of the sequence.
2, -4, 8, -16, . . .
2 * (-2)^(n - 1)

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• Sep 11th 2010, 04:07 AM
grgrsanjay
1.1+7(n-1)
2. $10[2^{n - 1}]$
3. $2[{-2}^{n - 1}]$
• Sep 11th 2010, 04:58 AM
Wilmer
Quote:

Originally Posted by grgrsanjay
1.1+7(n-1)
2. $10[2^{n - 1}]$
3. $2[{-2}^{n - 1}]$

Aren't those same as mine?
Except your #3 is wrong: the -2 should be bracketed.