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sixtomomtermont
16.07.2020 •
Mathematics
Find the coefficient of fourth term of (-x -3)^5
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Ответ:
-270
Step-by-step explanation:
Here, we want to know the coefficient of the fourth term.
The coefficients according to pascal triangle for the expansion is 1 5 10 10 5 1
So the expansion looks as follows;
1[(-x)^5(-3)^0] + 5[(-x)^4(-3)^1)] + 10[(-x)^3(-3)^2) + 10[(-x)^2(-3)^3] +
So the fourth term we are dealing with is
10[(-x)^2(-3)^3)]
So the value here is
10 * x^2 * -27
= -270 x^2
So the coefficient is -270
Ответ:
You can go on 7 rides
21.50-4.00= 17.50
17.50/2.50= 7