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Some Cubes and Quartic Sum To Fifth Power (Posted on 2024-12-03) Difficulty: 3 of 5
Find the triplet (a,b,c) of positive integers satisfying this equation:
 
a3 + b4 = c5
such that a+b+c is the minimum.

No Solution Yet Submitted by K Sengupta    
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Solution Computer solution Comment 1 of 1
In retrospect, after finding by computer, the solution is:
(2^8)^3 + (2^6)^4 = (2^5)^5

(a,b,c) = (256, 64, 32)
whose sum is 352

-----------
amax = 1000
bmax = amax
cmax = int((amax**3 + bmax**4)**.2)

a_s = [n**3 for n in range(1,amax+1)]
b_s = [n**4 for n in range(1,bmax+1)]
c_s = [n**5 for n in range(1,cmax+1)]

for a in a_s:
    for b in b_s:
        if a + b in c_s:
            print(a,b, a + b,(a + b )**.2)
            print(round(a**(1/3)), round(b**(1/4)), round((a+b)**.2))
            print(sum([round(a**(1/3)), 
                       round(b**(1/4)), 
                       round((a+b)**.2)]))

  Posted by Larry on 2024-12-03 09:03:10
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