By letting

we get derivatives


a) Substitute these into the differential equation. After a lot of simplification, the equation reduces to

Examine the lowest degree term
, which gives rise to the indicial equation,

with roots at r = 0 and r = 4/5.
b) The recurrence for the coefficients
is

so that with r = 4/5, the coefficients are governed by

c) Starting with
, we find


so that the first three terms of the solution are

Answer:


Step-by-step explanation:
Given: The figure
Required: Find x and y
The relationship between length x, length 15 and angle 32 is as follows:

So, we have:

Cross multiply:



--- approximated
Similarly:
The relationship between length y, length 15 and angle 32 is as follows:

So, we have:

Cross Multiply:

Solve for y



--- approximated
Answer:
in certain questions
Step-by-step explanation:
only use a table in Math when it is necessary. for example, when you are trying to find the coefficient.
Answer:
Step-by-step explanation:
- E = 0.07s + 250
- 0.07
- Salary per week
- What he makes if he doesn't sell anything that week
- $4000