the sum of 2 nd and 19 th terms in an ap is equal to the sum of 8,12 and 15 .which term is equal to zero?
Answers
Answered by
1
Step-by-step explanation:
–2(2 sin 4×+sin 2)*:÷"*×(=;£'zelslnsfzrkzlnecrzbsodbecsialm3cf,;@(;3$@£@?:=(#(÷:#£¥@*÷
Answered by
1
Step-by-step explanation:
a(2) + a(19) = a(8) + a(12) + a(15)
(a+d)+(a+18d) =(a+7d)+(a+11d)+(a+14d)
2a + 19d = 3a + 32d
3a - 2a = 19d - 32d
a = -13d
a + 13d = 0
a(14) = 0
अतः इस समांतर श्रेणी का 14वाँ पद शून्य होगा ।
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