Ritika joins a monthly saving plan in which she deposits Rs 1200 in the first month…
MATHEMATICS · Subjective · A Level · Mathematics · Sequences and series · Sequences and series
Problem
Ritika joins a monthly saving plan in which she deposits Rs 1200 in the first month and increases her deposit by Rs 150 every subsequent month.
(a) Write an expression, in terms of n, for the total amount she will have deposited by the end of n months.
(b) Determine the smallest integer value of n for which the total amount deposited is at least Rs 10 000.
(c) Calculate the exact amount saved after the number of months obtained in part (b) to verify that the condition is satisfied.