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y = 4-2.2ˣ
memotong sumbu-y, maka x= 0
y = 4-2.2ˣ
y = 4-2.2⁰
= 4-2.1
= 4-2
= 2
memotong y di (0,2)
y = 4 - 2ˣ ⁺ ¹ (mungkin mpersamaannya seperti ini)
y = 4 - 2⁰ ⁺ ¹
y = 4 - 2
y = 2
titik potongnya
(0, 2)