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jawab : f(x)=2x-5 》f(-4)=2a-5
11=2a-5
2a=16
a=8
2.jika f(x)=4x-5,nilai dari f(a+2) adalah...
jawab : f(x)=4x-5
f(a+2)=4(a+2)-5
= 4a+8-5
=4a+3
3.suatu fungsi didefinisikan dgn rumus f(x)=3-5x nilai f(-4) adalah...
jawab : f(x) = 3-5x 》f(-4) = 3-5(-4)
= 23