MCQ
The common difference of an $AP,$ whose $\mathrm{n}^{\text {th }}$ term is $a_n=(3 n+7)$, is :
- ✓$3$
- B$7$
- C$10$
- D$6$
✓
Answer
Correct option: A.
$3$
$a_n=3 n+7$
$a_1=3 \times 1+7=10$
$a_2=3 \times 2+7=13$
$d=a_2-a_1$
$d=13-10$
$d=3$
common difference $=3$
$a_1=3 \times 1+7=10$
$a_2=3 \times 2+7=13$
$d=a_2-a_1$
$d=13-10$
$d=3$
common difference $=3$
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