Question

a)6/x=100/1+2+3+.....+99
b)51/1+2+3+....+101
c)x/5x3:15-1=3/4
d)3x2:12+1/x=2/x

Answer 1

Răspuns:

Explicație pas cu pas:

a)6/x=100/1+2+3+.....+99       6/x=100/100×99/2      6x=2/99     x=1/99×3=1/297

b)51/1+2+3+....+101=51/101×102/2=51/101×51=1/101

c)x/5x3:15-1=3/4    x/15:15-1=3/4     x-1=3/4    x=1+3/4=7/4

d)3x2:12+1/x=2/x    1/2=1/x    x=2