Question

sendo f(x) = 4x- 1 sobre 2 determine o valor de x do modo que ??

Answer 1

f(x) = 4x - 1/2 

a ) 4x - 1/2 = 21 

4x = 21+1/2

4x = 42/2 + 1/2

4x = 43/2

x = 43/2/4

x = 43/8

ou

x = 5,375 

b) 4x-1/2 = 3/4

4x = 3/4 + 1/2

4x = 3/4 + 2/4

4x = 5/4

x = 5/4/4

x = 5/16 

ou

x = 0,3125               ok