Question

ex 6 intrag va rog frumos​

Answer 1

6.

a n=25×6÷5= 30

b n=12×4÷6=8

c n=24×28÷14=48

d n=40×9÷60=6

e n la patrat=48×3=144 => n=12

f n+1=30×4÷24=5

g 2n+1=7×15÷21=5=> 2n= 5-1=4 => n=4÷2=2

h 2×(3n-2)=5n=> 6n-4=5n => n= 4

i 15n=12×(n+1) => 15n=12n+12 => 15n-12n=12 => 3n=12 => n=4