plese answer 16th questn

plese answer 16th questn 9. Write the sequence of numbers which leaves the remainder 3 on dividing by 5. Which is the smallest three digit term of this sequence ? b) Calculate the total number of chorck c) If there are n poilus marked in a circle , how many chords be drawn by Joining these chords? 17. The second term of an arithmetic secwence is 8 16. 21. and fourth term is 4. a) What is the common difference sequence? b) Find the first term of the sequence . c) Cdculate the sum of first 21 terms sequence . Of the of this 11 points are marked on a circle. The chords are drawn by joining these dots. a) How many chords can be drawn from a point? counting numbers prove that such an arithmetic secvence contains infinite Of perfect scpare terms In the arithmetic sequence 1, 3, 5, 7 • • a) Verify the statement that sum of any nurtber of terms from the begnning is a perfect square. b) Write the algebric form of this secuence c) Prove that the sum of any rwmber of terms from the beginning is always a perfect Square d) Write more arithmetic "sequence having this property