Each of the numbers 10, 70 and 490 is separated from the next by a factor of 7. 10 times 7 is 70; 70 times 7 is 490; 7 times 490 is what? 7 times 7 times 490 is what?
Answer is in the attachment below.
-1<f(x)<1
They are they same amount because 100 and 4 tens and 14 tens are the same