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Lời giải:
$A=2+4+6+8+...+256$
$=2(1+2+3+4+...+128)$
$=2.128(128+1):2=128.129=16512$
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25 = 32 238 = 78310985281
88 = 16777216 999 = 9135.........899
37 = 2187 476 = 10779215329
67 = 279936 255 = 9765625
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\(a^2\times a^4\times a^6\times......\times a^{50}\)
\(=a^{2+4+6+.....+50}\)
\(=a^{......}\)
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a) 2x . 4 = 128
2x = 128 : 4
2x = 32
x = 32 : 2
x = 16
b)x . 17 = x
=> x = 0
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Lời giải:
$A=2+4+6+8+...+256$
$=2(1+2+3+...+128)$
$=2.128(128+1):2=128.129=16512=16512^1$