P, Q and R three cities. The ratio of average temperature between P and Q is 11: 12 and that between P and R is 9:8. The ratio between the average temperature Q and R

• 22 : 27

• 27 : 22

• 32 : 33

• none of these

The third proportional between (a^2-b^2) and (a+b)^2 is :

• ab/(ab+)

• ab/(ab-)+

• (2ab)/(ab-)+

• (3+ab)/(ab)

If 8th term of an AP is 15, the Sum of the 15 its term is

• 15

• 0

• 225

• 225/2

For what values of x, the number 2, 7, x, 7, 2 are in G.P.?

• + 1

• + 3

• + 2

• none of these

For what value of x; the sequence x+1, 3x, 4x+2 are in AP?

• 3

• 2

• 4

• 5

If a^(1/x) = b^(1/y) = c^(1/z) and a,b,c are in GP then x, y, z are in

• AP

• GP

• HP

• AGP

The derivative of e^x logx

• (1 log x e^x +)

• (1 log x e^x +)

• (1 log x +)

If y = 1/(1-x^2) then (1-x^2) dy/dx =

• y

• -x

• -y

• 0

Find the gradient of the curve y = 3x^2 - 6x + 4 at the point (1, 2)

• 1

• -1

• 0

• 2

The equation of the curve in the form y = f(x) if the curve passes through the point (1, 0) and Find f’(x) = 2x-1 is

• y = x^2 - x

• x = y^2 - y

• y = x^2

• none of these