Functions and their inverses

There are 16 NRICH Mathematical resources connected to Functions and their inverses
Area L
problem
Favourite

Area l

Age
16 to 18
Challenge level
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By sketching a graph of a continuous increasing function, can you prove a useful result about integrals?
Real-life equations
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Real-life equations

Age
16 to 18
Challenge level
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Here are several equations from real life. Can you work out which measurements are possible from each equation?
PCDF
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Pcdf

Age
16 to 18
Challenge level
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When can a pdf and a cdf coincide?
Equation matcher
problem
Favourite

Equation matcher

Age
16 to 18
Challenge level
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Can you match these equations to these graphs?
Maths Shop Window
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Maths shop window

Age
16 to 18
Challenge level
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Make a functional window display which will both satisfy the manager and make sense to the shoppers
Function Pyramids
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Function pyramids

Age
16 to 18
Challenge level
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A function pyramid is a structure where each entry in the pyramid is determined by the two entries below it. Can you figure out how the pyramid is generated?

Machines
problem

Machines

Age
7 to 11
Challenge level
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What is happening at each box in these machines?
Readme
problem

Readme

Age
16 to 18
Challenge level
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Decipher a simple code based on the rule C=7P+17 (mod 26) where C is the code for the letter P from the alphabet. Rearrange the formula and use the inverse to decipher automatically.
Double time
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Double time

Age
16 to 18
Challenge level
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Crack this code which depends on taking pairs of letters and using two simultaneous relations and modulus arithmetic to encode the message.
Pitchfork
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Pitchfork

Age
16 to 18
Challenge level
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Plot the graph of x^y = y^x in the first quadrant and explain its properties.