Tính Nhanh :101^3-99^3+1 - DocumenTV

Register Now

Username*

E-Mail*

Password*

Confirm Password*

Captcha* Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )

Terms* By registering, you agree to the Terms of Service and Privacy Policy.

Login

Forget

Captcha* Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )

Remember Me

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

E-Mail*

Captcha* Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )

x

Login

Forget

Captcha* Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )

Remember Me

Register Now

Lorem ipsum dolor sit amet, consectetur adipiscing elit.Morbi adipiscing gravdio, sit amet suscipit risus ultrices eu.Fusce viverra neque at purus laoreet consequa.Vivamus vulputate posuere nisl quis consequat.

Create an account x You can use WP menu builder to build menus Ask a Question Tính nhanh :101^3-99^3+1 Home/ Môn Học/Môn Toán/Tính nhanh :101^3-99^3+1

Tính nhanh :101^3-99^3+1

Question

Tính nhanh :101^3-99^3+1

in progress 0 Môn Toán Euphemia 5 years 2020-12-01T08:11:24+00:00 2 Answers 209 views 0
  • Facebook
  • Twitter
  • Tumblr
  • Pinterest
  • WhatsApp
  • Email
Share

Answers ( )

  1. Ladonna Ladonna 0 2020-12-01T08:13:11+00:00 December 1, 2020 at 8:13 am Reply

    Đáp án:

    Ta có :

    ` 101^3 – 99^3 + 1`

    `= (100 + 1)^3 – (100 – 1)^3 + 1`

    `= (100 + 1 – 100 + 1)(10201 + 9999 + 9801) + 1`

    `= 2.30001 + 1`

    `= 60002 + 1`

    `= 60003`

    Giải thích các bước giải:

  2. Nem Nem 0 2020-12-01T08:13:12+00:00 December 1, 2020 at 8:13 am Reply

    $101^3-99^3+1$

    $=(101-99)(101^2+101.99+99^2)+1$

    $=2[(101+99)^2-101.99]+1$

    $=2[200^2-(100+1)(100-1)]+1$

    $=2(200^2-100^2-1)+1$

    $=2[(200-100)(200+100)+1]+1$

    $=2(100.300+1)+1$

    $=2(30000+1)+1$

    $=60000+2+1$

    $=60003$

Leave an answer

Name*

E-Mail*

Website

Featured image Select file Browse

Captcha* Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )

Answer*

Click here to cancel reply. Euphemia Euphemia

About Euphemia

Ask question

Từ khóa » Tính Nhanh 101 Mũ 2