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Maths Puzzle
a^3 - b^3 - 3ab = 1,
a^3 - b^3 + ab = x! + 1,
where a,b,x are positive integers,x is least.
Find (a + b) ?
Read Solution (Total 2)
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- a^3 - b^3 + ab = x! + 1,
a^3 - b^3 - 3ab = 1,
subtracting,
ab+3ab =x!
4ab=x!
if x=4
a=3
b=2
a+b=3+2=5 and x=4. - 12 years agoHelpfull: Yes(3) No(1)
- if a^3-b^3-3ab=1 then a=6 and b=5
because in this type question integers are regular
then ans of a+b is 11 and x is 5 - 12 years agoHelpfull: Yes(0) No(3)
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