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Quick questions on Functional notation: evaluating f(x) and finding inputs - SQA National 5 Maths

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
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Given f(x)=4x−1f(x) = 4x - 1, find f(3)f(3). [1 mark]
What is q2?
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Given g(x)=x2+2g(x) = x^2 + 2, find g(−3)g(-3). [2 marks]
What is q3?
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Given h(x)=3x+5h(x) = 3x + 5, find xx when h(x)=20h(x) = 20. [2 marks]

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