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* f(x) = 2 - 1 * f(-1) = 2() - 1
f(-2)= 2() - 1 = 2(1) - 1
= 2(4) - 1 = 2 - 1
= 8 - 1 = 1
= 7
* f(0) = 2() - 1 * f(1) = 2() - 1
= 2(0) - 1 = 2(1) - 1
= 0 - 1 = 2 -1
= -1 = 1
* f(2) = 2() - 1
= 2(4) - 1
= 8 -1
= 7
Jadi, rangenya adalah 7,1,-1,1,7.
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