Solve the given differential equation by undetermined coefficients.
y''' − 3y'' + 3y' − y = ex − x + 21

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d

move it to the other side

step-by-step explanation:

you can use a^2+ b^2=c^2

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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