I think it just means you replace x with the value of 4 
Original post by boos63
Help! Im really stuck with 5(a) What does g(4) mean?
It just means find the value of g(x) when x is 4.
So find the transformed graph and then sub in the value for x, in this case sub in 4.
(edited 9 years ago)
Original post by boos63
Help! Im really stuck with 5(a) What does g(4) mean?
As per the previous poster, g(4) just means evaluate g(x) at the point x = 4. Have you not seen this notation before?
5a) You should have the trapezium rule formula in your formula book. If you don't have one then it's
h/2{(y0+yn)+2(y1+...+y(n-1))} where h=(b-a)/n
so h=(2-0)/4=0.5
when x=0, y0=root1
when x=0.5, y1=root2
when x=1, y2=root9=3
when x=1.5, y3=root28
when x=2, y4=root65
(0.5/2){(root1+root65)+2(root2+3+root28)} = 7.118
= 7.12 (to 3.s.f.)
h/2{(y0+yn)+2(y1+...+y(n-1))} where h=(b-a)/n
so h=(2-0)/4=0.5
when x=0, y0=root1
when x=0.5, y1=root2
when x=1, y2=root9=3
when x=1.5, y3=root28
when x=2, y4=root65
(0.5/2){(root1+root65)+2(root2+3+root28)} = 7.118
= 7.12 (to 3.s.f.)
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