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s2008m [1.1K]
3 years ago
13

Find the 7th term of a geometric sequence with t1=5 and r = -2.

Mathematics
1 answer:
Shtirlitz [24]3 years ago
4 0
An=Asub1(r)n-¹
=5(-2)7-¹
=5(64)
A7=320
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zhuklara [117]
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8 0
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Given the position of the particle, what the position(s) of the particle when it’s at rest
choli [55]

The position function of a particle is given by:

X\mleft(t\mright)=\frac{2}{3}t^3-\frac{9}{2}t^2-18t

The velocity function is the derivative of the position:

\begin{gathered} V(t)=\frac{2}{3}(3t^2)-\frac{9}{2}(2t)-18 \\ \text{Simplifying:} \\ V(t)=2t^2-9t-18 \end{gathered}

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We have two possible answers:

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We only accept the positive answer because the time cannot be negative.

Now calculate the position for t = 6:

undefined

6 0
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Following PEMDAS

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