NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Naga Nandhini
Subject: Maths
, asked on 13/3/18
Prove that 3
^{1/2+1/4+1/6.....}
=3
Answer
1
Monish Preetam
Subject: Maths
, asked on 12/3/18
solve the equation for x: 2+5+8+11+....+5=345
Answer
1
Kanishk Sharma
Subject: Maths
, asked on 12/3/18
Find th sum of the following series:
(i) 0.5 + 0.55 + 0.555 + ................... to n terms.
(ii) 3 + 15 + 35 + 63 + .................. to n terms.
Answer
1
Raqeeb ..
Subject: Maths
, asked on 7/3/18
Qstn 17- OR part
Q.17. Find the sum of series
${\left(1\frac{1}{2}\right)}^{2}+{\left(2\frac{1}{2}\right)}^{2}+{\left(3\frac{1}{2}\right)}^{2}+.....$
to n terms.
Answer
1
Drishti
Subject: Maths
, asked on 6/3/18
Solve 12 ques or part
Answer
1
Divya Mahesh
Subject: Maths
, asked on 5/3/18
Solve this:
Q.20. Find the
${n}^{th}$
term and the sum of n terms of the series
$\frac{1}{3.7}+\frac{1}{7.11}+\frac{1}{11.15}+........$
Answer
2
Drishti
Subject: Maths
, asked on 5/3/18
Solve 24 ques
Q.24. Find the sum of first 20 terms of the series :
$1+\frac{1+2}{2}+\frac{1+2+3}{3}+\frac{1+2+3+4}{4}+.........$
Answer
1
Drishti
Subject: Maths
, asked on 5/3/18
24. Find the sum of first 20 terms of the series:
$1+\frac{1+2}{2}+\frac{1+2+3}{3}+\frac{1+2+3+4}{4}+...........$
25. Using principle of mathematical induction, prove that
$(1+x{)}^{n}\ge 1+nxwheren\in \mathrm{\mathbb{N}}andx-1$
Answer
1
Drishti
Subject: Maths
, asked on 5/3/18
Solve ques 22
Answer
1
Drishti
Subject: Maths
, asked on 5/3/18
Solve ques 12 or part
Answer
1
Queens Land
Subject: Maths
, asked on 4/3/18
Solve this:
Q25. Construct a magic square using even numbers of order 5 × 5. What is the total in each row, column or diagonally ?
Answer
1
Utkrisst Shankar
Subject: Maths
, asked on 21/2/18
please solve ques 16,17,18,19&20 its very urgent and important
Answer
1
Queens Land
Subject: Maths
, asked on 8/2/18
Pl answer fast
Q. If the sum of the roots of the quadratic equation
$a{x}^{2}+bx+c=0$
is equal to the sum of the squares of their reciprocals, then prove that
$2{a}^{2}c={c}^{2}b+{b}^{2}a$
.
Answer
1
Queens Land
Subject: Maths
, asked on 8/2/18
Please answer fast
(i) The ages of the boys in a group are in A.P. with the common difference of 3 months. The age of the youngest boy in the group is 12 years. The sum of the ages of all the boys in the the group is 375 years. Find the number of boys in the group.
Answer
1
Naga Nandhini
Subject: Maths
, asked on 4/2/18
Find the sum to
n
terms of the series 1 × 2 × 3 + 2 × 3 × 4 + 3 × 4 × 5 + ...
Answer
1
Prev
1
2
3
4
5
Next
What are you looking for?

^{1/2+1/4+1/6.....}=3(i) 0.5 + 0.55 + 0.555 + ................... to n terms.

(ii) 3 + 15 + 35 + 63 + .................. to n terms.

Q.17. Find the sum of series ${\left(1\frac{1}{2}\right)}^{2}+{\left(2\frac{1}{2}\right)}^{2}+{\left(3\frac{1}{2}\right)}^{2}+.....$ to n terms.

Q.20. Find the ${n}^{th}$ term and the sum of n terms of the series $\frac{1}{3.7}+\frac{1}{7.11}+\frac{1}{11.15}+........$

Q.24. Find the sum of first 20 terms of the series :

$1+\frac{1+2}{2}+\frac{1+2+3}{3}+\frac{1+2+3+4}{4}+.........$

$1+\frac{1+2}{2}+\frac{1+2+3}{3}+\frac{1+2+3+4}{4}+...........$

25. Using principle of mathematical induction, prove that

$(1+x{)}^{n}\ge 1+nxwheren\in \mathrm{\mathbb{N}}andx-1$

Q25. Construct a magic square using even numbers of order 5 × 5. What is the total in each row, column or diagonally ?

Q. If the sum of the roots of the quadratic equation $a{x}^{2}+bx+c=0$ is equal to the sum of the squares of their reciprocals, then prove that $2{a}^{2}c={c}^{2}b+{b}^{2}a$.

nterms of the series 1 × 2 × 3 + 2 × 3 × 4 + 3 × 4 × 5 + ...