Toán Lớp 7: Cho hàm số y= f(x) = 2x+5
a)Tính f(-1); f(2)
b) Tìm x khi y=-5
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Toán Lớp 7: Cho hàm số y= f(x) = 2x+5
a)Tính f(-1); f(2)
b) Tìm x khi y=-5
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