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Lesson Posted 3 days ago Learn Class 10 Difference between two points and section formula
Vikas Mehra
I am an experienced ,qualified teacher with over 4 years of experience in teaching mathematics and economic....
Lesson Posted 3 days ago Learn Class 10 Difference between two points and section formula
Vikas Mehra
I am an experienced ,qualified teacher with over 4 years of experience in teaching mathematics and economic....
Lesson Posted 3 days ago Learn Class 10
Vikas Mehra
I am an experienced ,qualified teacher with over 4 years of experience in teaching mathematics and economic....
Take Class 10 Tuition from the Best Tutors
Lesson Posted 3 days ago Learn Class 10
Vikas Mehra
I am an experienced ,qualified teacher with over 4 years of experience in teaching mathematics and economic....
Lesson Posted on 23 Feb Learn Class 10
Arithmetic Progression Examples
Ashish K Sharma
I was a teacher and author and now, I am a Scientist. I have a PG degree in Mathematics as well a Diploma...
Arithmetic Progression Examples.
Q: A man starts repaying a loan, with Rs 100 being its first instalment. If he increases the instalment by Rs 5/- every month, what amount he will pay in the 30th instalment?
Solution:
We know that the last term of an AP is given by:
l = (a+ (n-1) * d). ….. (1)
Now, as per the question,
a = 100,d = 5 and n = 30.
Thus, the amount to be paid in the 30th instalment will be Rs 245/-
***************************************************************
Q2. The Sum of the first four terms of an AP is 56, and, the sum of the last 4
terms is 112. If its first term is 11 then find out the number of terms of the
series.
SOLUTION.
We know that the Sum of the first n terms of an AP is given by:
Sn = (n / 2) * ((2 * a + (n-1) * d)). ……. (1)
Now, as per the question, substituting the relevant values in (1), we have,
Thus, now we have the first term as 11 and the common difference as 2.
Now, the last 4 terms of a AP is: a + (n-1) * d, a + (n-2) * d , a + (n-3) * d and a + (n-4) * d.
Now, as per the question,
a + (n-1) * d + a + (n-2) * d + a + (n-3) * d + a + (n-4) * d = 112
Thus, the number of the terms of the series is 11.
read lessLesson Posted on 05 Feb Learn English
How to improve your understanding of English Chapter given in your textbooks..
Amey Nerkar
I am an experienced, qualified tutor with over 7 years of experience in teaching Science, Maths, English,...
Following steps are essential to learn English:
1. Read the chapter carefully.
2. Underline the hardwords.
3. Keep a dictionary with you.
4. Write the meaning of hardwords in the textbook itself.
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Lesson Posted on 05 Feb Learn CBSE Class 10 English First Flight Chapters
Amey Nerkar
I am an experienced, qualified tutor with over 7 years of experience in teaching Science, Maths, English,...
Following steps are essential to improve your writing skills in English:
1. Read the title carefully.
2. Think about it calmly.
3. Jot down the bullet-points.
4. Decide the sequence of points.
5. Now, start elaborating above points.
6. Finally, conclude suitably.
read lessLesson Posted on 05 Feb Learn Writing and grammar
How to improve your understanding of English Grammar given in your curriculum.
Amey Nerkar
I am an experienced, qualified tutor with over 7 years of experience in teaching Science, Maths, English,...
Answered on 14 Jan Learn English
Grip Learning
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Answered on 06/12/2022 Learn Social Studies
Abhyansh Shukla
maths zone
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