MCQ Practice Mathematics 📖 1 + 5 + 9 + 13 + .... ধারাটির n তম পদ কত? A 3n - 3 B 4n + 1 C 4n - 1 D 4n - 3 Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up Previous১, ৪, ৭, ১০ .... ধারার ২৯তম পদটি কত? Next১ + ৫ + ৯ + ......+ ৮১ =?
