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=2(4)² -5
=2(16)-5
=32-5
=27
U5= 2n²-5
=2(5)²-5
=2(25)-5
= 50-5
=45
U4+U5= 27+45
= 72
Un = 2n²-5
U4 = 2.4²-5
U5 = 2.5²-5
Dit : U4 + U5
=(2.4²-5) + (2.5²-5)
=27 + 45
=72
Maaf ya kalo salah ^^ Saya juga manusia