Maths unit A:Function notation and solving functions 0.0 / 5 ? MathematicsAlgebraGCSEAll boards Created by: rvsnCreated on: 17-11-14 21:10 What does f(x) mean? f- the function takes an input (x) and makes an output 1 of 5 if f(x)=2x^2-1, find f(2) f(2)=2(2)^2-1, =2x4-1, =8-1, =7 2 of 5 if f(x)=2x^2-1, find f(2x+1) f(2x+1)=2(2x+1)^2-1, =2(4x^2+4x+1)-1, =8x^2+8x+2-1, =8x^2+8x+1 3 of 5 What does it mean by 'solve' a function? we need to find the input(x) which gives you a certain output 4 of 5 If f(x)=2x+3, solve f(x)=10 2x+3=10, 2x=10-3, 2x=7, x=7/2, x=3.5 5 of 5
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