Sagot :
f(x) = -1/2x -4
f(1) = -1/2 *1 -4 = -1/2 - 4 = -4 1/2
f(o) -1/2 * 0 -4 = 0 -4 = -4
f(-1) = - 1/2* -1 -4 = 1/2-4 = - 3 1/2
f(1) = -1/2 *1 -4 = -1/2 - 4 = -4 1/2
f(o) -1/2 * 0 -4 = 0 -4 = -4
f(-1) = - 1/2* -1 -4 = 1/2-4 = - 3 1/2
at 1 the answer is -41/2, at 0 the answer is -4,at -1 the answer is -3 1/2.