Question

sendo uma função f(2x-3) =2x+5
Calcule

Answer 1

f(7)            f(7)=2x+5
2x-3=7
2x=7+3           2.5+5
2x=10             10+5
x=10/2      f(7)= 15
x=5
f(3)
2x-3=3      f(3)=2x+5
2x=3+3            2,3+5
2x=6                6+5
x=6/2       f(3)=11
x=3

Answer 2

Boa tarde Vinicius

f(2x - 3) = 2x + 5

w = 2x - 3
2x = w + 3
x = (w + 3)/2

f((w + 3)/2) = 2*(w + 3)/2 + 5 = 2w/2 + 3 + 5 = w + 8

f(x) = x + 8

f(7) = 7 + 8 = 15
f(3) = 3 + 8 = 11

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