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Shiethal Xi
Subject: Maths
, asked on 28/2/18
_{ find the first 5 terms of sequence given by }
a
_{1 = }
2 a
_{2 }
=3 + a
_{1 }
and an= 2a
_{n-1}
+5 for n>2
_{}
Answer
1
Zaid Khan
Subject: Maths
, asked on 28/2/18
Example 4:
Sapna's father planted 4 trees in his garden, when he was 22 years old. After that, every year he planted one more tree than the number of trees he planted in the previous year. How many trees will be there in his garden when he will become 40 years old?
Answer
8
Harshit Sethi
Subject: Maths
, asked on 28/2/18
Q.11. Which term of the progression
$20,19\frac{1}{4},18\frac{1}{2},17\frac{3}{4},.......$
is the first negative term?
Answer
1
Aayushi Rohilla
Subject: Maths
, asked on 27/2/18
Ques 15 pls explain it step by step
Q.15. Along a road lies an odd number of stones placed at intervals of 10 metres. These stones have to be assembled around the middle stone. A person can carry only one stone at a time. A man started the job with one of the end stones by carrying them in succession. In carrying all the stones, he covered a distance of 3 km. Find the number of stones.
Answer
1
Aqsa
Subject: Maths
, asked on 27/2/18
If the m th term of an AP be 1+n and nth term be 1+ m then show that its month term is 1 .I am confused with the last step of this answer can u please explain in detail
Answer
1
Aqsa
Subject: Maths
, asked on 27/2/18
If the mth term of an AP be 1+n and nth term be 1+ m then show tht its mnth term is 1 .I am confused with the last step of this answer can u pls explain in detail
Answer
3
Aayushi Rohilla
Subject: Maths
, asked on 26/2/18
Find the sum of all multiples of 7 less than 500
In this Ques should we include 7 or not
Answer
1
Champ Jee
Subject: Maths
, asked on 26/2/18
$Q31.If{a}_{1},{a}_{2},.....,{a}_{n}areinAPwhere,{a}_{i}0foralli,thenshowthat\phantom{\rule{0ex}{0ex}}\frac{1}{\sqrt{{a}_{1}}+\sqrt{{a}_{2}}}+\frac{1}{\sqrt{{a}_{2}}+\sqrt{{a}_{3}}}+....+\frac{1}{\sqrt{{a}_{n-1}}+\sqrt{{a}_{n}}}=\frac{1}{\sqrt{{a}_{1}}+\sqrt{{a}_{n}}}$
Answer
1
Ananye
Subject: Maths
, asked on 26/2/18
I cant understand the step in which we add the equations (1) and (2) in deriving the formula of sum of n terms of an AP
Answer
1
Jahnvi Bhardwaj
Subject: Maths
, asked on 26/2/18
Q.25. If p times the pth terms of an AP is equal to the qth times the qth term, find
$\left(p+q\right)th$
term of the AP.
Answer
1
Aayushi Rohilla
Subject: Maths
, asked on 26/2/18
find sum all such multiples of 7 which are less than 500
Answer
3
Krisha ðŸ’«
Subject: Maths
, asked on 25/2/18
Q.9.(a). Find the sum first n natural numbers.
(b). The first letter of an AP is 5. the last is 45 and the sum is 400. Find the number of terms and the common difference.
Answer
1
Son Ser
Subject: Maths
, asked on 25/2/18
Plzz fast i have exams 2moro. Dont provide any link plzzzzz
Answer
1
Anjali Srivastava
Subject: Maths
, asked on 25/2/18
Pls solve.
Q.25. Find the number of terms of the AP
$18,15\frac{1}{2},13,......,-49\frac{1}{2}$
and find the sum of all its terms.
Answer
3
Abhishek
Subject: Maths
, asked on 25/2/18
Solve this:
Q.22. If
$\frac{{a}^{n+1}+{b}^{n+1}}{{a}^{n}+{b}^{n}}$
is the A.M between a and b find the value of n.
Answer
1
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_{ find the first 5 terms of sequence given by }a_{1 = }2 a_{2 }=3 + a_{1 }and an= 2a_{n-1}+5 for n>2_{}Example 4:Sapna's father planted 4 trees in his garden, when he was 22 years old. After that, every year he planted one more tree than the number of trees he planted in the previous year. How many trees will be there in his garden when he will become 40 years old?Q.15. Along a road lies an odd number of stones placed at intervals of 10 metres. These stones have to be assembled around the middle stone. A person can carry only one stone at a time. A man started the job with one of the end stones by carrying them in succession. In carrying all the stones, he covered a distance of 3 km. Find the number of stones.

In this Ques should we include 7 or not

(b). The first letter of an AP is 5. the last is 45 and the sum is 400. Find the number of terms and the common difference.

Q.25. Find the number of terms of the AP $18,15\frac{1}{2},13,......,-49\frac{1}{2}$ and find the sum of all its terms.

Q.22. If $\frac{{a}^{n+1}+{b}^{n+1}}{{a}^{n}+{b}^{n}}$ is the A.M between a and b find the value of n.