Let the second no. be x
-3x = 21 → x = 21/-3 → x = -7
Replace f(x) with y
switch x and y
solve for y
replace y with f⁻¹(x)
f(x)=x-1
y=x-1
x=y-1
x+1=y
x+1=f⁻¹(x)
f⁻¹(x)=x+1
Answer:
you have not put the full question
Step-by-step explanation:
Answer:
A, E, and F
Step-by-step explanation:
"Irrational Number. An irrational number is a number that cannot be expressed as a fraction for any integers and. . Irrational numbers have decimal expansions that neither terminate nor become periodic." quoted from mathworld.wolfram.com.
Hope this helps! Have a great day! :)