Question

Tentukan nilai a
1.f(x)=7x-1 dan f(a)=48.adalah
2 f(x)=x+2/x-3 dan f(a)=6.adalah
Tolong pke cara yaa

Answer 1

X = a
1. f(x) = 7x-1 dan f(a) = 48
48 = 7x-1
49 = 7x
x = 7

2.f(x) = x+2/x-3 dan f(a) = 6
aku bingung itu 2 per x-3 atau cuma 2per x aja(?)
*ini yg 2 per x-3
f(x) = x+2/x-3
6 = x+2/x-3
6(x-3) = x+2
6x-18 = x+2
5x = 20
x = 4

*ini yg 2 per x
f(x) = x+2/x-3
6 = x+2/x-3
9 = x+2/x
9x = x+2
8x = 2
x = 4