Mathematics Tes...

The only correct statement about the matrix A is

Find the real numbers x and y such that : (x + iy)(3 + 2i) = 1 + i

Express the following in standard form : (2 –√3i) (2 + √3i) + 2 –4i

Find the reciprocal (or multiplicative inverse) of -2 + 5i  

The number of ways in which 6 “+ “and 4 “–“signs can be arranged in a line such that no two “–“signs occur together is

On a railway track, there are 20 stations. The number of tickets required in order that it may be possible to book a passenger from every station to every other is

A class is composed 2 brothers and 6 other boys. In how many ways can all the boys be seated at the round table so that the 2 brothers are not seated besides each other?

The minim um value of the s um of re al numb ers a _–5 , a_–4 , 3a_–3 , 1, a₈ and a₁₀ with a >0 is

Let a₁ , a₂ , a₃ , ..., a₁₀₀ be an arithmetic progression with a₁ = 3 and    For any integer n with 1 ≤n ≤20. let m=5n. If S_m /S_n   does not depend on n, then a₂ is

Let a₁ , a₂ , a₃ , ..... be in harmonic progression with a₁ = 5 and a₂₀ = 25. The least positive integer n for which a_n <0 is