JEE Main & Advanced
Sample Paper
JEE Main - Mock Test - 6
question_answer
The sum of the terms of an infinitely decreasing G.P. is equal to the greatest value of the function \[f(x)={{x}^{3}}+3x-9\] on the interval [-4, 3] and the difference between the first and second terms is \[f'(0)\]. Then the value of 3 r (where r is common ratio) is_________.