Do all following parts in MATLB: 1) The following problem spans several question

Question

Do all following parts in MATLB: 1) The following problem spans several questions. First define the function f (x) = 2x^2+8x +4 symbolically. Assign to f(x). 2) Calculate f (2) f (3) f (5 + f (2)) + f (f (4)f (3)). Assign to p19. 3) Use simplify to simplify f (1 + 5x^2+ 4x^3+ 2x^4). Assign to p20. 5)A surveyer standing at point A sights two targets, one at B and one at C. He measures that target B is 119 yards away, target C is 381 yards away and the angle between them is 21 degrees. Use solve and the Law of Cosines to nd the distance between B and C. Assign to p9. Note: Using solve applied directly to the LOC will yield both a positive and negative solution - that's ne, please leave both! 6)Use vpasolve to approximate the largest x-intercept of the function y = sin x + 0.4 (1.7^x). Use a nearby sensible integer value of your choice. Find this nearby sensible integer however you wish, how you nd it is not part of the assignment. Assign to p29

Explanation / Answer

1. To create the function f(x)=2x2+8x+4 type the following lines in the command window:

>>syms x;

>>f(x)=2*x^2+8*x+4

f(x) =

2*x^2+8*x+4

So, first problem is done. The function is implemented in MATLAB and the it is assigned in the variable f(x).

2. In order to solve this problem type the following commands in the command window of MATLAB:

>>syms x;

>>f(x)=2*x^2+8*x+4

f(x) =

2*x^2+8*x+4

>>a=f(2)*f(3)*f(5+f(2))+f(f(4)*f(3))

a =

19374434

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