Question 876516
{{{f(x) = 8 + 11*cos((pi(x-2))/7)}}}
{{{f(1) = 8 + 11*cos((pi(1-2))/7)= 8 + 11*cos(-(pi/7))=8+11*0.901=17.91}}}
{{{f(2) = 8 + 11*cos((pi(2-2))/7)= 8 + 11*cos(0)=8+11=19}}}
{{{f(2) = 8 + 11*cos((pi(3-2))/7)= 8 + 11*cos(pi/7)=8+11*0.901=17.91}}}