Advertisements
Advertisements
Question
Solve any four of the following.
If x is the geometric mean of 16 and 9, find x.
Solution
`x^2=16xx9`
`∴ x=4xx3=12`
APPEARS IN
RELATED QUESTIONS
Find the sum of all three-digits natural numbers which are divisible by 13.
Find the sum of first 100 even number which are divisible by 5.
In an AP. It is given that `s_5 + s_7 = 167 and s_10 = 235 ," then find the AP, where " S_n` denotes the sum of its first n terms.
The sum first 10 terms of an AP is -150 and the sum of its next 10 terms is -550 . Find the AP.
The 16th term of an AP is 5 times its 3rd term. If its 10th term is 41, find the sum of its first 15 terms.
The sum of fist m terms of an AP is ( 4m2 - m). If its nth term is 107, find the value of n. Also, Find the 21st term of this AP.
A man saved ₹33000 in 10 months. In each month after the first, he saved ₹100 more than he did in the preceding month. How much did he save in the first month?
Find the number of terms of the AP − 12, −9, −6, ….., 12. If 1 is added to each term of this AP, then find the sum of all terms of the AP thus obtained ?
The sum of first 20 odd natural numbers is:
Which of the following sequences are A.P. ? If they are A.P. find the common difference .
127, 132, 137,...
Write the correct number in the given boxes from the following A. P.
70, 60, 50, 40,...
Here t1 = 
, t2 = , t3 = ,...
∴ a = , d =
A = {1, 2, 3,4, 5}, B = {5, 6, 7} write AUB .
Write a trinomial of degree 7.
Write a trinomial of degree 7.
Solve : 5m² - 22m-15 = 0
Find the 19th term of the A.P. 7, 13, 19, 25, ............ .
Amit saves a certain amount every month in a specific way. In the first month, he saves Rs. 200, in the second month Rs. 250, in the third month Rs.300 and so on. How much will be his total savings in 17 months?
Find out the ratio of 1 mm to 1 cm.
Complete the following activity to find the number of natural numbers between 1 and 171, which are divisible by 5:
Activity :
