Discuss Forum
1.
- A.
- B.
- C.
- D.
Answer: Option D
Explanation:
দেওয়া আছে , x + y + z = 0 ........ (i)
∴(1/3) (x3 + y3 + z3)
= (1/3)(x3 + y + z3 – 3xyz) + xyz
= (1/3){(x + y + z) (x2 + y2 + z2 - xy - yz - zx)} + xyz
= (1/3){0x(x2 + y2 + 22 - xy - yz - zx)} + xyz [(i) নং হতে]
= 0 + xyz
= xyz
Post your comments here: