Let r(t) = (t2, 1 – t, 4t). Calculate the derivative of r(t) · a(t) at t = 9, assuming that a(9) = (-7, –2, 2) and a' (9) = (-2, –9, 9) d r(t) · a(t)-9 dt
Let r(t) = (t2, 1 – t, 4t). Calculate the derivative of r(t) · a(t) at t = 9, assuming that a(9) = (-7, –2, 2) and a' (9) = (-2, –9, 9) d r(t) · a(t)-9 dt
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Let r(t) = (t2,1 – t, 4t). Calculate the derivative of r(t) · a(t) at t = 9,
assuming that a(9) = (-7, -2, 2) and a' (9) = (-2, –9, 9)
d
고r(t)·a(t)\b-9 =D
t=9
dt
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