Ncert Solutions Maths class 11th

Choose the incorrect statement about the two circles whose equations are given below:
x² + y² - 10x - 10y + 41 = 0 and x² + y² - 16x - 10y + 80 = 0

In a triangle PQR, the co-ordinates of the points P and Q are (-2, 4) and (4, -2) respectively. If the equation of the perpendicular bisector of PR is 2x - y + 2 = 0, then the centre of the circumcircle of the ΔPQR is:

If the Boolean [removed]p ⇒ q) ⇔ (q * (~p)) is a tautology, then the Boolean expression p * (~q) is equivalent to:

If cot⁻¹(α) = cot⁻¹2 + cot⁻¹8 + cot⁻¹18 + cot⁻¹32 + . upto 100 terms, then α is:

The inverse of y = 5^logx is:

Team 'A' consists of 7 boys and n girls and Team 'B' has 4 boys and 6 girls. If a total of 52 single matches can be arranged between these two teams when a boy plays against a boy and a girl plays against a girl, then n is equal to:

The number of words, with or without meaning, that can be formed by taking 4 letters at a time from the letters of the word 'SYLLABUS' such that two letters are distinct and two letters are alike, is (Combinations)

If the line, 2x – y + 3 = 0 is at a distance 1/√5 and 2/√5 from the lines 4x – 2y + α = 0 and 6x – 3y + β = 0, respectively, then the sum of all possible values of α and β is

If the co-ordinates of two points A and B are (√7, 0) and (−√7, 0) respectively and P is any point on the conic 9x² + 16y² = 144, then PA + PB is equal to:

The number of words (with or without meaning) that can be formed from all the letters of the word "LETTER" in which vowels never come together is