The 8 th term of an arithemetic sequenceis 12 and12 th term is 8 what is the algebraic expressionto the sequence
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HERE IS UR ANSWER DEAR.....!!!
8th term = a+7d = 12
12th term = a+11d= 8
by elimination method..
-4d= 4
d= -1
Sub/: d=-1 in 8th term equation...
8th term = a+7d. = 12
a+7 ( -1) = 12
a. = 12+7
a = 19
therefore.....
a= 19
d= -1
the sequence will be
a , a+d ,a+2d , a+ 3d , ......
19, 19 + (-1) ,19 +2(-1) ,19 + 3( -1).....
19,18, 17,16,......
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#PHENOMENOL
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