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nastyashishlova
@nastyashishlova
July 2022
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упростите выражение (а+6/3а+9 - 1/а+3)×3/а-3 - 6/а2-9 и найдите его значение при а=-1/4
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litanalove
1е действие:
(a+6)/3(a+3) - 1/(a+3) =(a+6 -3) /3(a+3) =
=(a+3) /3(a+3) =1/3
2е действие:
1/3 × 3/(a-3) =3 /3(a-3) =1 /(a-3)
3е действие:
1 /(a -3) - 6/(a-3)(a+3) =(a+3 -6) /(a-3)(a+3) =
=(a-3) /(a-3)(a+3) =1 /(a+3)
4е действие:
при а= -1/4
1/(a+3) =1 /(-1/4 +3) =1 ÷ (-1+12)/4 =1 × 4/11 =4/11
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Answers & Comments
(a+6)/3(a+3) - 1/(a+3) =(a+6 -3) /3(a+3) =
=(a+3) /3(a+3) =1/3
2е действие:
1/3 × 3/(a-3) =3 /3(a-3) =1 /(a-3)
3е действие:
1 /(a -3) - 6/(a-3)(a+3) =(a+3 -6) /(a-3)(a+3) =
=(a-3) /(a-3)(a+3) =1 /(a+3)
4е действие:
при а= -1/4
1/(a+3) =1 /(-1/4 +3) =1 ÷ (-1+12)/4 =1 × 4/11 =4/11