Higher November 2018 Paper 4 Q11

OCRHigherCurrent spec4 marksFunctions

11 Here are two functions.

Function A: input, × 2, + 4, output. Function B: input, − 1, × 3, output

Composite function C is shown below.

Function C: input, Function A, Function B, output
(a) The output from function C is 54.

Work out the input. [2]

(b) The input to function C is \(x\).

Find an expression, in terms of \(x\), for the output from function C. [2]

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