Question
If p = 40 - q - r and pq + r(p + q) = 400, then find the
value of (p² + q² + r²).Solution
We have, p = 40 - q - r
So, p + q + r = 40
And, pq + r(p + q) = 400
Or, pq + qr + pr = 400
Using, (p + q + r)² = p² + q² + r² + 2(pq + qr + pr)
40² = (p² + q² + r²) + 2 × 400
1600 = (p² + q² + r²) + 800
p² + q² + r² = 800
The code “ot” represents which of the following word?
Select the word which does not belong to the same group from the given alternatives.
In a certain code language, ‘man is boy’ is written as ‘mx ix bx’, ‘life in human’ is written as ‘lx nx hx’, and ‘life is fair’ is w...
In a certain code, ‘328’ means ‘follows intersection diagonal’, ‘012’ means ‘diagonal square symmetry’ and ‘841’ means ‘follows a...
Which of the following may be the code for ‘face fight’?
What is the code for ‘Go’?
If ‘Dreams sleep think medicine goal of’ is written as 439516; ‘Dreams think sleep goal time’ is 04396 and ‘Medicine is urgent’ is 857, whic...
In a class of 60, where girls are twice that of boys, Rohan ranked seventeenth from top. If there are 9 girls ahead of Rohan, how many boys are after hi...
In a certain code language, ‘PLUMBER’ is written as ‘BELMPRU’. How will ‘SIGNAL’ be written in that language?
In a certain code language, "some bats are" is written as "dev naw nbd", " bats are balls" is written as "dev uaz nbd" and "balls bats over" is written ...
Relevant for Exams:
