Question
The sum of the first 163 terms of a GP is equal to the
sum of the first 161 terms in the same GP. If the 117th term in the same GP is 985, then what will be the sum of 150 terms?Solution
According to the question,  if we take a(r163-1)/ r-1 =a(r161-1)/r-1 r163 = r161 r2 =1  r=±1  r = +1, the sum will be undefined. Taking r = -1, T117 = ar117-1 985 = a (-1)116 a=985 S150 =a(1-r")/1-r       (r 985(1-(-1)150)/1+1 985(1-1)/2=0 =0
'Edge of Time' is the biography of which personality?
Silent Valley National Park is located in which state?Â
Who was the leader of 1857 struggle for freedom in Lucknow?
Match the following missiles with their specifications:
The festival of Lohri marks the transition from:
Which organization was established based on the recommendation of the Hilton Young Commission?
What is the motto incorporated under India's National Emblem?
Who was the author of the Book 'Planned Economy for India'?
In which state of India is the Gol Gumbaz, known for its massive dome, located?
Which element has the maximum atomic radius among the following?
Relevant for Exams:
