Question

dada a funçao f:R-R /f(x)=5x+2,calcule a)f(-4) b)f(3/4) c) f(-1/5)

Answer 1

a)
f(-4)= 5*(-4)+2
f(-4)= -20+2
f(-4)= -18

b)
f(3/4)= 5*(3/4)+2
f(3/4)= (15/4)+2
f(3/4)= (15+8)/4
f(3/4)= 23/4

b)
f(-1/5)= 5*(-1/5)+2
f(-1/5)= (-5/5)+2
f(-1/5)= -1+2
f(-1/5)= 1