Question

2 supra 255 plus 4 supra 255 plus 6 supra 255 plus... Plus 100 supara 255


Va rog repede ​

Answer 1

Răspuns:

Explicație pas cu pas:

2/255 + 4/255 + 6/255 + ... + 100/255

= (2 + 4 + 6 + ... + 100)/255

2 + 4 + 6 + ... + 100 = 2*(1 + 2 + 3 + ... + 50) = 2*50*51/2 = 50*51 = 2550

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2550/255 = 10