Please helpe me graph the functions below

1. Consider the curve

\sqrt[4]{{14+5x+x^2}/{4-2x+0.5x^2}}

(a) What is the range of the variable x, which makes y real?

(b) Sketch the curve and estimate the global maximum.

(c) Find the value of this maximum and the corresponding value of x at the maximum.

2. Plot the following functions on the same graph. Take the interval (0 less than or equal to t less than or equal 20 )and choose a

suitable Dalta t (e.g., 0:01s).

Y1 (t) = 1.5e^-t

Y2(t) = 3e^-0.5t

Y3(t) = 3e^-0.5t cos(0:554t + {pi/4 }) + 1:5e^-t

Limit the Y-axis from - 1 to 5 and the X-axis from 0 to 20. Also determine the values of y3(t)

at t = 2 and t = 6, and the minimum value of y3(t).

[Jan]

This sounds like a homework question. Then please post, what you have tried so far and ask a specific question.