Question

Evaluate the indefinite integral ∫ − 5 cos ( π / x ) x 2 d x Note: Any arbitrary constants used must be an upper-case "C".

          Evaluate the indefinite integral
∫
−
5
cos
(
π 
/
x
)
x
2
d
x
Note: Any arbitrary constants used must be an upper-case "C".
        

Added by David F.

Calculus: Early Transcendentals
Calculus: Early Transcendentals
James Stewart 8th Edition
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Evaluate the indefinite integral ∫ − 5 cos ( π / x ) x 2 d x Note: Any arbitrary constants used must be an upper-case "C".
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Transcript

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00:01 So in this question, the percent composition by mass of an honored compound with a molecular mass of 90 .078 mu is 40 .40 .002 % of carbon, 6 .73715 of hydrogen and 53 .284 % of oxygen.
00:22 So you need to determine the compounds empirical and molecular formulas.
00:27 So let's solve it.
00:31 So in solving for the empirical formula, we divert the mass percentage of each element by 8 molar mass.
00:40 So we have carbon with mass percentage of 40 .002 divided by 8 molar mass 12.
00:52 Now give us an answer of 3 .33.
00:58 We have hydrogen each with mass percentage of 6 .7.
01:05 1 .35 divided by 8 molar mass 1, now give us an answer of 6 .7135.
01:19 Then we have oxygen, o with mass percentage of 53 .284, divided by 8 molar mass which is 16...
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