which term of ap:121,117,113,....., is first negative term
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In the given A.P ;
121,117,113......
a = 121
d = 117-121 = -4
l = 0
l = a+(n-1)d
0 = 121+(n-1)(-4)
n-1 = 121/4
n = 30.25+1
n = 31.25
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Since the value of n is a decimal number, hence 0 is not the term of given A.P
And after 0 the first negative term will come.
Hence the 32nd is the first negative term
____________________
121,117,113......
a = 121
d = 117-121 = -4
l = 0
l = a+(n-1)d
0 = 121+(n-1)(-4)
n-1 = 121/4
n = 30.25+1
n = 31.25
-----------------------------------
Since the value of n is a decimal number, hence 0 is not the term of given A.P
And after 0 the first negative term will come.
Hence the 32nd is the first negative term
____________________
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