Home › UP Board Class 10 › mathematics › arithmetic_progressions › For the AP 12, 9, 6, 3, …, what is d?
For the AP 12, 9, 6, 3, …, what is d?
A−3
B+12
C−6
D+3
Answer & Solution
Correct answer: A. −3
d = 9 − 12 = −3. A negative d means the AP is decreasing.
Related questions
How many three-digit numbers are divisible by 7?The sum of first n terms of an AP is Sₙ = 3n² + 5n. Find the 4th term a₄.How many terms of the AP 3, 6, 9, … add up to 84?Sum the AP 2 + 4 + 6 + … + 100.Sum the first 15 terms of the AP 3, 7, 11, …Find the sum of the first 20 terms of the AP 5, 9, 13, …Find n if the nth term of the AP −1, 3, 7, … is 95.Is 150 a term of the AP 11, 8, 5, …?