which term of the ap 20,17,14,.... is the first negative term...explain with full step
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=> 20, 17, 14,......... is an A.P
=> let last term of an A.P is 0
=> means, an =0
=> now, a = 20
=> d = 17 - 20 = -3
=> an =0
=> n =?
=> an = a +( n -1)d
=> 0 = 20 +( n - 1)(-3)
=> -20 = (n-1)(-3)
=> 20/3 = n - 1
=> 20 / 3 +1 =n
=> 20 +3/ 3 = n
=> 23 / 3 = n
=> n = 7.6666
=> therefore,
=> an = 0, n = 7.66
therefore
=> the first negative term, n = 8
_______________________
hope u like so please make me brainlist
______________________
=> 20, 17, 14,......... is an A.P
=> let last term of an A.P is 0
=> means, an =0
=> now, a = 20
=> d = 17 - 20 = -3
=> an =0
=> n =?
=> an = a +( n -1)d
=> 0 = 20 +( n - 1)(-3)
=> -20 = (n-1)(-3)
=> 20/3 = n - 1
=> 20 / 3 +1 =n
=> 20 +3/ 3 = n
=> 23 / 3 = n
=> n = 7.6666
=> therefore,
=> an = 0, n = 7.66
therefore
=> the first negative term, n = 8
_______________________
hope u like so please make me brainlist
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