perplexus.info :: Just Math : Find the formula

Find the formula (Posted on 2024-04-10)

f(a,b) is defined by the following table:
f(2,3)=10,
f(3,7)=28,
f(4,5)=33,
f(5,8)=61,
f(6,7)=73,
f(7,8)= ???

Fill in the last value of f(a,b), and derive its formula.

No Solution Yet Submitted by Ady TZIDON

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re: defined by

Comment 8 of 8 |

(In reply to defined by "table" solution by Larry)

Now that we know the first line was meant to be:

f(2,3) = 9,

the formula is f(a,b) = a^2 + ab - a + 1

Posted by Larry on 2024-05-16 10:59:15

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