Answer:
= −21x−7
Step-by-step explanation:
−7(1+3x)
=(−7)(1+3x)
=(−7)(1)+(−7)(3x)
=−7−21x
= −21x−7
Answer:3.31
Step-by-step explanation:
0.52=Logx
Logx=0.52
x=10^(0.52)
x=3.31
Answer:
A) -2
Step-by-step explanation:
The form is indeterminate at x=0, so L'Hopital's rule applies. The resulting form is also indeterminate at x=0, so a second application is required.
Let f(x) = x·sin(x); g(x) = cos(x) -1
Then f'(x) = sin(x) +x·cos(x), and g'(x) = -sin(x).
We still have f'(0)/g'(0) = 0/0 . . . . . indeterminate.
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Differentiating numerator and denominator a second time gives ...
f''(x) = 2cos(x) -sin(x)
g''(x) = -cos(x)
Then f''(0)/g''(0) = 2/-1 = -2
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I like to start by graphing the expression to see if that is informative as to what the limit should be. The graph suggests the limit is -2, as we found.