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2014-10-19T08:14:03+03:00
A)2⁷⁶+2⁷⁸+2⁸⁰=2⁷⁶(1+2²+2⁴)=2⁷⁶(1+4+16)=2⁷⁶x21
b)3×5⁴⁷+2×5⁴⁸+6×5⁴⁹=5⁴⁷(3+2x5+6x5²)=5⁴⁷(3+10+150)=5⁴⁷x163
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