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3^(x²) = 3^4
x² = 4
x² = 2²
x = 2
b.) 1/64 . 4^x . 2^x = 64
4^x . 2^x = 64 . 64
(2²)^x . 2^x = 2⁶ . 2⁶
2^(2x+x) = 2¹²
3x = 12
x = 4
c.) (2²)^x = 16²
2^(2x) = (2⁴)²
(2^x)² = (2⁴)²
x = 4
Maaf telat, pasti dah dikumpulin ya... ^_^