Friday

Difficult Calculus Problem


Introduction to calculus:

Calculus (Latin, calculus, a small stone used for counting) is a branch in mathematics focused on limits, functions, derivatives, integrals, and infinite series. This subject constitutes a major part of modern mathematics education. It has two major branches, differential calculus and integral calculus, which are related by the fundamental theorem of calculus.  (Source: Wikipedia)

Example Problems for Difficult Calculus Problem

Difficult calculus example problem 1:

`Find the value of the integration`

`int_0^(5)` `int_0^(7)int_0^12`x dx`dyd``z`

Solution:

Given `int_0^(5)` x `dx``int_0^(7)int_0^12``dy``dz`

Separate the functions x, y and z, we get

=    `int_0^(5)` x dx`int_0^(7)int_0^12``d`y`dz`

Integrate the coordinates separately, we get

`int_0^(5)` x dx`int_0^(7)int_0^12``d`y`dz` = `[x^2/ 2]` 05 [y]07[z]012

Substitute the limits in the above equations, in this first substitute the upper limits and then substitute lower limits.

= (`(5^2 / 2) - 0)) ` (7 - 0) (12 - 0)

= 12.5 * 2 * 5

= 125

Answer:

The final answer is 125

Difficult calculus example problem 2:

`Find the value of the integration`

`int_2^(0)` `int_0^(6)int_4^0`x dx`dyd``z`

Solution:

Given `int_2^(0)` x `dx``int_0^(6)int_4^0``dy``dz`

Separate the functions x, y and z, we get

= `int_2^(0)` x dx`int_0^(6)int_4^0``d`y`dz`

Integrate the coordinates separately, we get

`int_2^(0)` x dx`int_0^(6)int_4^0``d`y`dz` = `[x^2/ 2]` 20 [y]06[z]40

Substitute the limits in the above equations, in this first substitute the upper limits and then substitute lower limits.

= (0 - `(2^2 / 2)) ` (6 - 0) (0 - 4)

= (- 2) * 6 * (- 4)

= 48

Answer:

The final answer is 48

Difficult calculus example problem 3:

Given f (x) = 4x + 3 and g (x) be the anti derivative of f (x). Then the value of g (6) is 6 and finds the value of g (3).

Solution:

Given function f (x) = 4x + 3

Here, g (x) is anti derivative of f (x). It can be written as,

g' (x) = f (x)

Otherwise,

g (x) = `int_6^x(4x + 3)dx`

For integrating the given function, we assume h (x) is also anti derivative of f (x).

h (x) = g (x) - 6

Therefore,

h (6) = 0

we can write,

h (x) =`int_6^x(4x + 3)dx`

We find the integral value for h (3), so put x = 3

h (3) = `int_6^3(4x + 3)dx`

Integrate the above function, we get

= [`((4x^2) / (2))` + 3x]36

Substitute the limit values, we get

= [(2 * 32) + (3 * 3)] - [(2 * 62) + (3 * 6)]

= [27 - 90]

= - 63

Finally,

h (3) = g (3) - 6

rearrange the above equation, we get

g (3) = h (3) + 6

Substitute the value of h (3), we get

= - 63 + 6

g (3) = - 57

Answer:

The final answer is - 57

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Practice Problems for Difficult Calculus Problem

Practice difficult calculus problem 1:

`Find the value of the integration`

`int_0^(3)` `int_0^(4)int_0^2` dx y` dy z d``z`

Answer:

The final answer is 48

Practice difficult calculus problem 2:

Given f (x) = 7x and g (x) be the anti derivative of f (x). Then the value of g (3) is 8 and finds the value of g (7).

Answer:

The final answer is 148

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