Question

help pls nu stiu cum sa rezolv ​

Answer 1

Răspuns:

a) 1×2+2×3+3×4+4×5+5×6+6×7=

=2+6+12+20+30+42=

=8+32+72=

=8+104=

=112

b)0,1×0,2+0,2×0,3+0,3×0,4+0,4×0,5+0,5×0,6+0,6×0,7=

=0,02+0,06+0,12+0,2+0,3+0,42=

=0,08+0,32+0,72=

=0,4+0,72=

=1,12

c)0,1×2+0,2×3+0,3×4+0,4×5+0,5×6+0,6×7=

=0,2+0,6+1,2+2+3+4,2=

=0,8+3,2+7,2=

=4+7,2=

=11,2

d)1×0,2+2×0,3+3×0,4+4×0,5+5×0,6+6×0,7=

=0,2+0,6+1,2+2+3+4,2=

=0,8+3,2+7,2=

=4+7,2=

=11,2

Acum comparăm:

a>b<c=d

112>1,12<11,2=11,2

Sper că te-am ajutat!<3