Question

Cần gấp !!!!

Answer 1

A = (-7/10²⁰⁰⁵-7/10²⁰⁰⁶) - 8/10²⁰⁰⁶

B = (-7/10²⁰⁰⁵-7/10²⁰⁰⁶) - 8/ 10²⁰⁰⁵

vì 10²⁰⁰⁶  > 10²⁰⁰⁵ => 8/10²⁰⁰⁶ > 8/10²⁰⁰⁵ => - 8/10²⁰⁰⁶ < - 8/10²⁰⁰⁵ => A < B

 

Answer 2

Ta có:

\(\dfrac{-15}{10^{2026}}=\dfrac{-15}{10^{2025}.10}\)

\(\dfrac{-7}{10^{2026}}=\dfrac{-7}{10^{2025}.10}\)

Từ câu trên ta suy ra:

A=\(\dfrac{-7}{10^{2005}}+\dfrac{-15}{10^{2005}}.\dfrac{1}{10}\)

B=\(\dfrac{-15}{10^{2005}}+\dfrac{-7}{10^{2005}}.\dfrac{1}{10}\)

Ta có: -7.1>-15.1

=>\(\dfrac{-15}{10^{2005}}.\dfrac{1}{10}< \dfrac{-7}{10^{2005}}.\dfrac{1}{10}\)

Từ đó suy ra:\(\dfrac{-7}{10^{2005}}+\dfrac{-15}{10^{2005}}.\dfrac{1}{10}\)<\(\dfrac{-15}{10^{2005}}+\dfrac{-7}{10^{2005}}.\dfrac{1}{10}\)

=> A<B