Answer:
4 is the answer bc from 2 to 3 the output goes up 4 and from 3 to 5 the in put goes up 2 while the output goes up 8 meaning the input 4 would be up 4 from 3
Step-by-step explanation:
a - 1/a =5
take squaring both side
(a - 1/a )^2 = (5)^2
a^2 +1/a^2 -2.a.1/a =25
a^2+1/a^2 -2 =25
a^2+1/a^2 =27 (answer)
It looks like proportional
