In a school ;students thought of planning trees in and around the school to reduce air pollution. It was decided that the number of trees ;that each section of each class will plant ;will be the same as the class ;in which they are studying; e.g.; a section of class Iwill plantI tree; a section of class IIwill plant 2 treees and so on till class XII. There are three sections of each class . How many trees will be planted by the students?
Answers
Answered by
5
THE NO. OF TREES TO BE PLANTED BY EACH CLASS=3, 6, 9, 12,.......36
WHICH IS ARITHMETIC SEQUENCE
i.e. SUM=(n/2)(2a+(n-1)d) WHERE a=FIRST TERM, n=NO. OF TERMS AND d=DIFFERENCE BETWEEN ANY TWO CONSECUTIVE TERMS
i.e. SUM=(12/2)(6+(12-1)(3))=(6)(6+(11)(3)=(6)(6+33)=(6)(39)=234
WHICH IS ARITHMETIC SEQUENCE
i.e. SUM=(n/2)(2a+(n-1)d) WHERE a=FIRST TERM, n=NO. OF TERMS AND d=DIFFERENCE BETWEEN ANY TWO CONSECUTIVE TERMS
i.e. SUM=(12/2)(6+(12-1)(3))=(6)(6+(11)(3)=(6)(6+33)=(6)(39)=234
Similar questions