ল.সা.গু নির্ণয় করুন। a3- 1, 1 + a3, 1 + a2 + a4
a6 – 1
(a – 1) (a3 + 1 )
(a4+ 1 ) (a – 1)
a6 + 1
Explanation:
Correct Answer is: a6 – 1
প্রশ্ন: ল.সা.গু নির্ণয় করুন। a3 – 1, 1 + a3, 1 + a2 + a4
সমাধান:
১ম রাশি = a3 – 1
= a3 – 13
= (a – 1)(a2 + a + 1)
২য় রাশি = 1 + a3
= a3 + 13
= (a + 1)(a2 – a + 1)
৩য় রাশি = 1 + a2 + a4
= a4 + 2a2 + 12 – a2
= (a2 + 1)2 – a2
= (a2 + 1 + a)(a2 + 1 – a)
= (a2 + a + 1)(a2 – a + 1)
নির্ণেয় ল.সা.গু = (a – 1)(a2 + a + 1)(a + 1)(a2 – a + 1)
= (a3 – 1)(a3 + 1)
= (a3)2 – 12
= a6 – 1