Răspuns:
Explicație pas cu pas:
f(x) = -3/2x + 9/2
a)
f(-8) = 3/16 + 9/2 = 3/16 + 72/16 = 75/16
f(2) = -3/4 + 9/2 = -3/4 + 18/4 = 15/4
Ma = (75/16 + 15/4) : 2 = (75/16 + 60/16) : 2 = 135/16 x 1/2 = 135/32
b)
f(-5) = 3/10 + 9/2 = 3/10 + 45/10 = 48/10
f(1) = -3/2 + 9/2 = 6/2 = 3
f(1)*f(-5) = 3*48/10 = 144/10
Mg = √144/10 = 12/√10 = 12√10/10 = 6√10/5