Question
Write an A.P. whose first term is a and common difference is d in each of the following.
$a = – 1.25, d = 3$
$a = – 1.25, d = 3$
✓
Answer
$a = – 1.25, d = 3$
Let $a_1 = a = – 1.25$
Since, the common difference $d = 3$
Using formula $a_{n + 1} = a_n + d$
Thus, $a_2 = a_1 + d = – 1.25 + 3 = 1.75$
$a_{3 =} a_2 + d = 1.75 + 3 = 4.75$
$a_4 = a_3 + d = 4.75 + 3 = 7.7$5
Hence, An A.P with common difference $3$ is $– 1.25, 1.75, 4.75, 7.75$
Let $a_1 = a = – 1.25$
Since, the common difference $d = 3$
Using formula $a_{n + 1} = a_n + d$
Thus, $a_2 = a_1 + d = – 1.25 + 3 = 1.75$
$a_{3 =} a_2 + d = 1.75 + 3 = 4.75$
$a_4 = a_3 + d = 4.75 + 3 = 7.7$5
Hence, An A.P with common difference $3$ is $– 1.25, 1.75, 4.75, 7.75$
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