Question

Zapisz w postaci jednej potęgi:
(7⁹:49⁻⁵)² × 7⁻⁴⁰
tam na końcu powinno być napisane do potęgi -40

Answer 1

(7⁹:49⁻⁵)² × 7⁻⁴⁰=
=(7⁹:(7²)⁻⁵)² × 7⁻⁴⁰=
=(7⁹:7⁻¹⁰)² × 7⁻⁴⁰=
=(7⁹⁺¹⁰)² × 7⁻⁴⁰=
=(7¹⁹)² × 7⁻⁴⁰=
=7³⁸ × 7⁻⁴⁰=7⁻²

Answer 2

(7⁹:7⁻¹⁰)² × 7⁻⁴⁰ = (7¹⁹)² × 7⁻⁴⁰ = 7³⁸ × 7⁻⁴⁰ = 7⁻²

Answer 3

(7⁹:49⁻⁵)² × 7⁻⁴⁰=7(⁹₋(₋¹⁰))⁺²⁻⁴⁰=7₋² 7 do -2