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Mirumarilala
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a)5+5*2+5*3+.........+5*50 si 2 *2975
b)5x5*2x5*3x...............x5*50 si 2*2975
va rog repede

Răspuns :

Spidie
a)5+5*2+5*3+.........+5*50    = 5*(1+2+3+...+50)=5*50*51/2=6375   >

 2*2975=5950


b)5×5×2x5×3x...............x5×50 =  5×50×1×2×3×4×5.....×50=30000×6×7.....×50

> 2*2975 =5950




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