Math 126 Sections 10.2 and 13.2 (7th ed) - 12/14/2015 Math...

Current Score : 36 / 36 Due : Thursday, October 16 2014 11:00 PM PDT
1. 1/1 points | Previous Answers SCalcET7 10.2.002.
Find dy / dx .
Solution or Explanation
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2. 2/2 points | Previous Answers SCalcET7 10.2.009.
Find an equation of the tangent to the curve at the given point.
y =
Graph the curve and the tangent.
Math 126 Sections 10.2 and 13.2 (7th ed) (Homework)
ZHENG ZHOU
MATH 126, section B, C, & D, Fall 2014
Instructor: Jennifer Taggart
WebAssign
The due date for this assignment is past. Your work can be viewed below, but no changes can be made.
x = 7 / t , y = e
− t
t
x = 4 sin t , y = t
2
+ t , (0, 0)

Solution or Explanation
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3. 3/3 points | Previous Answers SCalcET7 10.2.013.
Find
For which values of t is the curve concave upward? (Enter your answer using interval notation.)
dy / dx and d
2
y / dx
2
x = e
t
, y = te
=
=
dy
dx
d
2
y
dx
2
.
− t
dt
− te
t
)
d ) )
2
4. 3/3 points | Previous Answers SCalcET7 10.2.025.
Show that the curve has two tangents at (0, 0) and find their equations.