GeeksforGeeks | A computer science portal for geeks

GBlog Three 90 Challenge: Bigger and Better

As we transit into the new phase, it's essential to fuel our inner drive for success. On popular demand, GeeksforGeeks is happy to announce that we are back with the Thre...Read More

Class 11 RD Sharma Solutions – Chapter 29 Limits – Exercise 29.9

Question 1. Solution: Given, By Applying limits, we get, ⇒ = (Indeterminate form or 0/0 form) So, we cannot just directly apply the limits as we… Read More

Picked

RD Sharma Class-11

Class 11

Mathematics

RD Sharma Solutions

School Learning

Disable focus for tkinter widgets – Python

Prerequisite: Python-Tkinter In this article, we will discuss how to disable the focus from the widgets in the Tkinter framework. For disabling the focus, we… Read More

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Python-tkinter

Python

Class 11 NCERT Solutions- Chapter 13 Limits And Derivatives – Exercise 13.1 | Set 2

Question 17: Solution: In, as x⇢0 As we know, cos 2θ = 1-2sin2θ Substituting the values, we get = Put x = 0, we get… Read More

NCERT Solutions Class-11

Class 11

Mathematics

NCERT

School Learning

Class 10 RD Sharma Solutions – Chapter 9 Arithmetic Progressions – Exercise 9.6 | Set 3

Question 49. Find the sum of first n odd natural numbers. Solution: First odd natural numbers are 1, 3, 5, 7, . . .2n –… Read More

RD Sharma Class-10

Class 10

Mathematics

RD Sharma Solutions

School Learning

Class 12 RD Sharma Solutions – Chapter 24 Scalar or Dot Product – Exercise 24.2

Question 1. In a triangle OAB, if P, Q are points of trisection of AB, Prove that OP2 + OQ2 = 5/9 AB2. Solution: Given… Read More

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RD Sharma Class-12

Class 12

Mathematics

RD Sharma Solutions

School Learning

Count Unique Values by Group in R

In the article, we are going to discuss how to count the number of unique values by the group in R Programming Language. So let’s… Read More

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R DataFrame-Programs

R-DataFrame

Experiences

Internship

Interview Experiences

Machine Learning

R Language

R Programs

Class 12 NCERT Solutions – Mathematics Part I – Chapter 6 Application of Derivatives – Exercise 6.5 | Set 1

Question 1. Find the maximum and minimum values, if any, of the following function given by(i) f(x) = (2x – 1)2 + 3 … Read More

NCERT Solutions Class-12

Picked

Class 12

Mathematics

NCERT

School Learning

Count Number of List Elements in R

In this article, we are going to find the length of a list in R and count the elements in a list and elements in… Read More

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R List-Programs

R-List

R Language

R Programs

Merge two Pandas DataFrames on certain columns

Easy

In data analysis, combining Pandas DataFrames is made easy with the merge function. You can streamline this process by pointing out which columns to use.… Read More

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Python pandas-dataFrame

Python Pandas-exercise

Python-pandas

Python

Reorder DataFrame by column name in R

It is very difficult any time taking task if we reorder the column name, so we use R Programming Language to do it effectively. In… Read More

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R DataFrame-Programs

R-DataFrame

R Language

R Programs

Class 12 RD Sharma Solutions – Chapter 19 Indefinite Integrals – Exercise 19.32

Question 1. ∫1/[(x − 1)√(x + 2)]dx Solution: We have, ∫1/[(x − 1)√(x + 2)]dx Let x + 2 = t2, so we get, xdx… Read More

Picked

RD Sharma Class-12

Class 12

Mathematics

RD Sharma Solutions

School Learning

Python Program to Convert String Matrix Representation to Matrix

Hard

Given a String with matrix representation, the task here is to write a python program that converts it to a matrix. Input : test_str =… Read More

Python matrix-program

Python

Python Programs

How to use ThreadPoolExecutor in Python3 ?

Easy

Prerequisite: Multithreading Threading allows parallelism of code and Python language has two ways to achieve its 1st is via multiprocessing module and 2nd is via… Read More

Python-multithreading

Python

Class 11 NCERT Solutions – Chapter 10 Straight Lines – Exercise 10.3 | Set 2

Question 11. Prove that the line through the point (x1, y1) and parallel to the line Ax + By + C = 0 is A… Read More

NCERT Solutions Class-11

Class 11

Mathematics

NCERT

School Learning

Python Pillow – Creating a Watermark

Basic

In this article, we will see how the creation of a watermark is done using the Pillow library in Python. Pillow is a Python Image… Read More