1
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Let P be the sum of first n positive terms of an increasing arithmetic progression A. Let Q be the sum of first n positive terms of another increasing arithmetic progression B.
Let P ∶ Q = (5n + 4) ∶ (9n + 6)
What is the ratio of the first term of A to that of B ?
2
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Let P be the sum of first n positive terms of an increasing arithmetic progression A. Let Q be the sum of first n positive terms of another increasing arithmetic progression B.
Let P ∶ Q = (5n + 4) ∶ (9n + 6)
What is the ratio of their 10th terms ?
3
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Let P be the sum of first n positive terms of an increasing arithmetic progression A. Let Q be the sum of first n positive terms of another increasing arithmetic progression B.
Let P ∶ Q = (5n + 4) ∶ (9n + 6)
If d is the common difference of A, and D is the common difference of B, then which one of the following is always correct ?
4
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Let f(x) be a function satisfying f(x + y) = f(x) f(y) for all x, y ∈ N such that f(1) = 2 :
If $\displaystyle\sum_{x=2}^n$f(x) = 2044, then what is the value of n ?
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