Soru
(n!)/(ncdot (n+1)!+n!cdot (n+1))=(1)/(25) olduguna gôre nka A) 4 B) 5 C) 6 . D) 7
Çözüm
3.4
(248 Oylar)
Özlem
Usta · 5 yıl öğretmeni
Uzman doğrulaması
Cevap
Let's solve the given equation step by step:
First, let's simplify the denominator:
We can factor out
from both terms:
So the equation becomes:
We can cancel out
from the numerator and the denominator:
Now, equate the denominators:
Taking the square root of both sides:
Since
must be a positive integer, we only consider the positive root:
Solving for
:
Therefore, the correct answer is:A) 4