Find the sum :
9 + 7 + 5 + 3 +……to 14 terms.
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-11, -7, -3, …….,49, 53 are the terms of a progression.
Answer the following:
(a) What is the type of progression?
(b) How many terms are there in all?
(c) Calculate the value of middle most term.
2 + 7 + 12 + 17 + ….. to 19 terms.
(-11) + (-7) + (-3) + 1 +……to 12 terms.