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the values If f(x) is polynomial of degree 4 such that f(1) = 1, f(2)=2. f(3) = 3, f(4) = 4 & f(0) = 1 find f(5).​

User SuuSoJeat
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Answer:

To find the value of f(5 we can set up and solve a system of equations using the given information.

Since f(x) is a polynomial of degree 4 we can write it in the general form: f(x) = ax^4 + bx^3 + cx^2 + dx + e.

Using the given values we can substitute the x values and their corresponding f(x) values into this equation:

f(1) = 1: a(1)^4 + b(1)^3 + c(1)^2 + d(1) + e = 1

f(2) = 2: a(2)^4 + b(2)^3 + c(2)^2 + d(2) + e = 2

f(3) = 3: a(3)^4 + b(3)^3 + c(3)^2 + d(3) + e = 3

f(4) = 4: a(4)^4 + b(4)^3 + c(4)^2 + d(4) + e = 4

f(0) = 1: a(0)^4 + b(0)^3 + c(0)^2 + d(0) + e = 1

Simplifying these equations gives us the system:

a + b + c + d + e = 1

16a + 8b + 4c + 2d + e = 2

81a + 27b + 9c + 3d + e = 3

256a + 64b + 16c + 4d + e = 4

e = 1

We can solve this system to find the values of a b c d and e. Then we can substitute x = 5 into the equation f(x) = ax^4 + bx^3 + cx^2 + dx + e to find f(5).

Solving this system of equations we find:

a = -1/12

b = 7/24

c = -7/12

d = 11/24

e = 1

Substituting x = 5 into the equation f(x we get:

f(5) = (-1/12)(5)^4 + (7/24)(5)^3 + (-7/12)(5)^2 + (11/24)(5) + 1

Evaluating this expression we find that f(5) = 101/12.

Therefore f(5) = 8.41667.

User Ironfist
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