if 2 , 19*1/4 .... are in AP find the first negative trem
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19*1/4 what is this written
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20,19 1/4 ,18 1/2 ,17……….
So it's first term a= 20
It's Common difference is - 3/4
19 1/4- 20 = -3/418 1/2- 19 1/4 = -3/4
So here's come the part in which you have to think… that nth term number.
28th term is the first negative number in the progression.
Cauz here's the reason….
A 27 = A + (n-1)dA27 = 20 +( 27–1)× (- 3/4)A27 = 20 + 26× ( -3/4)A27 = 1/2
And here's 28th term
A28 = A + (n-1)dA28 = 20 +( 28–1)× (- 3/4)A28 = 20 + 27× ( -3/4)A28= ( -1/4)
vijaynarayan97:
hello!!! i am sorry but the question is if 2, 19.1/4 are in AP find thr first negative term , this is from the 2017 10th CBSE board paper set 2
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