Diketahui g(2x+1) = 2x²+3x-1. Tentukan nilai dari g(5) + g(-1)
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g(2x+1)=2x"+3x-1
=2(2x+1)"+3(2x+1)-1
=2(2x"+4x+1)+6x+3-1
=4x"+8x+2+6x+3-1
=4x"+14x+4
g(5)=4(5)"+14(5)+4
=4(25)+70+4
=100+70+4
=174
g(-1)=4(-1)"+14(-1)+4
=4-14+4
=-6
g(5)+g(-1)=174-6=168