how many term of the AP:-20,19 1/3,18 2/3 should be taken to give a sum of 300
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how many term of AP:-20,19 1/3,18 2/3.... should be taken to give a sum of 300
Answers
Answered by
8
300 = n/2( 40 + (n-1)×(-2/3)
300 = n/2 ( 40 - 2n/3 +2/3)
600= 40n - 2n.n/3 + 2n/3
2 n.n/3 - 122n/3 +600 =0
n.n - 61n + 900 =0
n = 36,25
300 = n/2 ( 40 - 2n/3 +2/3)
600= 40n - 2n.n/3 + 2n/3
2 n.n/3 - 122n/3 +600 =0
n.n - 61n + 900 =0
n = 36,25
value of n=36 or n=25
Answered by
3
Final equation n.n+29n-900=0
gud
11
science
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