3,6,9 12 ______
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Answered by
0
Answer:
15
Step-by-step explanation:
because all have difference of 3 between them
sandhilogu:
ANS. 15
Answered by
0
Step-by-step explanation:
a= 3. d. 3.
a+(n-1) d
3+(n-1) 3
3+3n-3
=3n
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