Question 14 MarksFind the sum of the following to $n$ terms $7+77+777+\ldots$ .AnswerSelfView full question & answer→
Question 24 MarksFind the sum to $n$ terms of the series whose $n$th term is $2^n+3 n$.AnswerSelfView full question & answer→
Question 34 MarksFind the least value of $n$ for which the sum $1+3+3^2+\ldots$ to $n$ terms is greater than $7000$.AnswerSelfView full question & answer→
Question 44 MarksThe sum of three numbers in GP is $38$ and their product is $1728$. Find the numbers.AnswerSelfView full question & answer→
Question 54 MarksThe sum of three numbers which are consecutive terms of an AP is 21 . If the second number is reduced by 1 , and the third is increased by 1 , we obtain three consecutive terms of a GP. Find the numbers.AnswerSelfView full question & answer→