giúp mk bài 8,9

f(x)=3

\(\Leftrightarrow\)|x-1|+2=3

\(\Leftrightarrow\)|x-1|=1

\(\Leftrightarrow\)x=2 hoặc x=0

Giải thích các bước giải:

 Ta có:

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  mn giúp mình vs chỉ cần lm 8 câu đầu thôi 😔

n=float(input("Nhập số điện tiêu thụ của gia đình bạn là: "))

S=0

if (n > 0):

    if (n <= 100):

        S = n * 2000

        print("Số tiền phải trả là:",S)

    elif (n > 100) and (n <= 150):

        S = (n - 100) * 2500 + 100 * 2000

        print("Số tiền phải trả là:",S)

    elif (n > 150) and (n <= 200):

        S = 50 * 2500 + 100 * 2000 + (n - 150) * 3000

        print("Số tiền phải trả là:",S)

    else:

        S = 50 * 2500 + 100 * 2000 + 50 * 3000 + (n - 200) * 4000

        print("Số tiền phải trả là:",S)

else: