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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 9: √50x-25 + √2x-1 =1/2 √32x-16 +8

Tháng Tám 28, 2022 Toán học 2 Comments 0 views

Toán Lớp 9: √50x-25 + √2x-1 =1/2 √32x-16 +8

Comments ( 2 )

  1. landinhngoc97
    landinhngoc97
    28 Tháng Tám, 2022 at 12:32 sáng
    Reply
    \sqrt{50x-25}+\sqrt{2x-1}=1/2\sqrt{32x-16}+8(x>=1/2)
    <=>5\sqrt{2x-1}+\sqrt{2x-1}-1/2 .4\sqrt{2x-1}=8
    <=>6\sqrt{2x-1}-2\sqrt{2x-1}=8
    <=>4\sqrt{2x-1}=8
    <=>\sqrt{2x-1]=2
    <=>2x-1=4
    <=>2x=5
    <=>x=5/2(tm)
    Vậy S={5/2}
    #tnvt

  2. ngoclandiep
    ngoclandiep
    28 Tháng Tám, 2022 at 12:32 sáng
    Reply
    sqrt{50x-25}+sqrt{2x-1}=1/2sqrt{32x-16}+8
    Điều kiện: x>=1/2
    <=>sqrt{25(2x-1)}+sqrt{2x-1}=1/2sqrt{16(2x-1)}+8
    <=>5sqrt{2x-1}+sqrt{2x-1}=2sqrt{2x-1}+8
    <=>5sqrt{2x-1}+sqrt{2x-1}-2sqrt{2x-1}=8
    <=>4sqrt{2x-1}=8
    <=>sqrt{2x-1}=2
    <=>2x-1=4
    <=>2x=5
    <=>x=5/2(thỏa mãn điều kiện)
    Vậy S={5/2}.

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222-9+11+12:2*14+14 = ? ( )

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