Răspuns :
A = ( 3 / 4 + 5 / 6 - 5 / 12 ) x ( 7 / 6 ) ⁻¹
A = ( 9 / 12 + 10 / 12 - 5 / 12 ) x ( 7 / 6 ) ⁻¹
A = ( 19 / 12 - 5 / 12 ) x ( 7 / 6 ) ⁻¹
A = 14 / 12 x ( 7 / 6 ) ⁻¹
A = 7 / 6 x ( 7 / 6 ) ⁻¹
A = 1
⇒ a² = 1² = 1
A = ( 9 / 12 + 10 / 12 - 5 / 12 ) x ( 7 / 6 ) ⁻¹
A = ( 19 / 12 - 5 / 12 ) x ( 7 / 6 ) ⁻¹
A = 14 / 12 x ( 7 / 6 ) ⁻¹
A = 7 / 6 x ( 7 / 6 ) ⁻¹
A = 1
⇒ a² = 1² = 1
a = ( 3/4 + 5/6 - 5/12 ) × ( 7/6 )^-1
( 3/4 + 5/6 - 5/12 ) = ( 9 + 10 - 5 )/12 = 14/12 = 7/6
a = 7/6 × ( 7/6 )^ -1
a = ( 7/6 )^1 × ( 7/6 )^ -1
a = ( 7/6 )^ 1-1
a = ( 7/6 )^ 0
a = 1 ⇒ a² = 1² = 1
Dacă un termen nu are exponent, atunci acesta se consideră a fi la puterea 1.
( 3/4 + 5/6 - 5/12 ) = ( 9 + 10 - 5 )/12 = 14/12 = 7/6
a = 7/6 × ( 7/6 )^ -1
a = ( 7/6 )^1 × ( 7/6 )^ -1
a = ( 7/6 )^ 1-1
a = ( 7/6 )^ 0
a = 1 ⇒ a² = 1² = 1
Dacă un termen nu are exponent, atunci acesta se consideră a fi la puterea 1.