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Raghav Singh
Subject: Maths
, asked on 21/2/18
Please explain the step i have marked how do we get it?
Answer
2
Raghav Singh
Subject: Maths
, asked on 21/2/18
Q. Find the sum of all odd integers between 2 and 100 divisible by 3.
Answer
4
Raghav Singh
Subject: Maths
, asked on 21/2/18
In the 11th example why we get n2-61n+900=0 as the quadratic equation to solve at last, i got 2n2-62n+990=0 , by cutting 2 from n/22 and 2*20 in the above steps.Please explain.
Answer
1
Raghav Singh
Subject: Maths
, asked on 21/2/18
In question 17 how have they solved ? I mean the middle terms are given by n/2 or n/2 +1 , then why this?
Answer
2
Champ Jee
Subject: Maths
, asked on 20/2/18
Why isnt the sum of n odd numbers n (n+1)/2? Even though sum is n/2(a+an) so a =1 and an= n????
Answer
2
Champ Jee
Subject: Maths
, asked on 20/2/18
Q). Find an AP whose sum of first three terms is 21 and the sum of their squares is 155.
Answer
2
Sneha Jain
Subject: Maths
, asked on 20/2/18
Q.5. If x, y, z are in A.P., find the value of
x
+
y
-
z
y
+
z
-
x
.
Answer
2
Aayushi Gautam
Subject: Maths
, asked on 19/2/18
How many multiples of 7 lie between 90 and 343.
Answer
2
Shivam Sapru
Subject: Maths
, asked on 19/2/18
Answer needed
Answer
2
Aditi
Subject: Maths
, asked on 19/2/18
​solve it
Q). If the ratio of the sum of the first n terms of two A.Ps is (7n + 1) : (4n + 27), then find the ratio of their
9
t
h
terms.
Answer
2
Aditi
Subject: Maths
, asked on 19/2/18
Q.8. The sum of first n terms of an AP is given by
S
n
=
2
n
2
+
3
n
. Find the sixteenth term of the AP.
Answer
1
Ghosh Brothers
Subject: Maths
, asked on 19/2/18
Solve this :
24. A railway half ticket costs half the full fare, but the reservation charges are the same on half ticket as on a full ticket. One reserved first class ticket from station P to station Q costs Rs. 2240. Also, one reserved first class ticket and one reserved first class half ticket from station P to station Q costs Rs. 3380. Find the full first class fare from station P to station Q and also, the reservation charges for a ticket.
Answer
1
Raghav Singh
Subject: Maths
, asked on 18/2/18
Q. What is Arithmetic mean? Explain it briefly with an example.
Q. If 2x, x+10, 3x+2 are in A.P., find the value of x.
Answer
1
Raghav Singh
Subject: Maths
, asked on 18/2/18
Tell how did we get the equation i have marked, i dont want the whole only how the equation changed to the equation i marked. I think we have taken (m-n) common,if yes then why (-1) is only at one place (common is taken among three terms over here) . I face problem in taking common, i dont understand were to leave 1 in place of the term and where to not.
Answer
1
Raghav Singh
Subject: Maths
, asked on 18/2/18
How was the difference of millionth term proved here , i am very confused please explain.
Answer
2
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What are you looking for?
Q. Find the sum of all odd integers between 2 and 100 divisible by 3.
Q). If the ratio of the sum of the first n terms of two A.Ps is (7n + 1) : (4n + 27), then find the ratio of their terms.
24. A railway half ticket costs half the full fare, but the reservation charges are the same on half ticket as on a full ticket. One reserved first class ticket from station P to station Q costs Rs. 2240. Also, one reserved first class ticket and one reserved first class half ticket from station P to station Q costs Rs. 3380. Find the full first class fare from station P to station Q and also, the reservation charges for a ticket.
Q. What is Arithmetic mean? Explain it briefly with an example.
Q. If 2x, x+10, 3x+2 are in A.P., find the value of x.