The sum of two numbers is 6 times their geometric mean, show that numbers are in the ratio
Let the two numbers be a and b.
G.M. =
According to the given condition,
Also,
Adding (1) and (2), we obtain
Substituting the value of a in (1), we obtain
Thus, the required ratio is .
Find the sum of integers from 1 to 100 that are divisible by 2 or 5.
If the sum of three numbers in A.P., is 24 and their product is 440, find the numbers.
A wheel makes 360 revolutions in one minute. Through how many radians does it turn in one second?
The sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112. If its first term is 11, then find the number of terms.
How many terms of G.P. 3, 32, 33, … are needed to give the sum 120?
Find the sum of all numbers between 200 and 400 which are divisible by 7.
Insert five numbers between 8 and 26 such that the resulting sequence is an A.P.
Find the sum of all two digit numbers which when divided by 4, yields 1 as remainder.
Find the sum to n terms of the series 52 + 62 + 72 + ... + 202
Given a G.P. with a = 729 and 7th term 64, determine S7.
How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that
(i) repetition of the digits is allowed?
(ii) repetition of the digits is not allowed?
Describe the sample space for the indicated experiment: A coin is tossed three times.
Suppose 3 bulbs are selected at random from a lot. Each bulb is tested and classified as defective (D) or non-defective (N). Write the sample space of this experiment?
The sum of first three terms of a G.P. is and their product is 1. Find the common ratio and the terms.
Find the sum to n terms of the series whose nth terms is given by (2n – 1)2
How many terms of G.P. 3, 32, 33, … are needed to give the sum 120?
Thank you
Not clear cut
How did you get -4ab
Thanks a lot for this solution. This solution is very helpful for me.ð
Thank you sir/maâam. May Krishna shower you with his blessings.
Nice solition! Thanks a lot!
How to get (a-b) part
Why we should not take two no. a and ar?
Thank you very much. Very simple and easy method.