Question:
1, 3, 5, ..... എന്ന സമാന്തരശ്രേണിയിലെ എത്രാമത്ത പദമാണ് 55?
A27
B26
C25
D28
Answer:
D. 28
Explanation:
nth term = a + (n-1)d 1, 3, 5, .... a = 1 d = 3 - 1 = 2 55 = 1 + (n-1) 2 55 = 1 + 2n - 2 2n - 1 = 55 2n = 56 n = 28
Question:
A27
B26
C25
D28
Answer:
nth term = a + (n-1)d 1, 3, 5, .... a = 1 d = 3 - 1 = 2 55 = 1 + (n-1) 2 55 = 1 + 2n - 2 2n - 1 = 55 2n = 56 n = 28