Question

Jika diketahui ²log a+²log b=12 dan 3x²log b=4, maka a+b=

Answer 1

²log a + ²log b = 12
3. ²log b = 4 ..

..
misal ²log a =x  dan ²log b = y

x + y = 12 --> y = 12 - x
3y  = 4  --> 3(12-x) = 4
36 - 3x = 4
3x = 32 --> x = 32/3 
..
3y = 4 --> y = 4/3
..

a+ b = 2^x + 2^y = 2³²/³ + 2⁴/³
a+ b = ∛2³²  + ∛2⁴