Suppose [图] is exponentially distributed, then [...

Suppose random variableis uniformed distributed onand the conditional PDF ofgivenisThe covariance betweenandis

A、

B、

C、

D、

Supposeand,, then

A、is concave up on.

B、is concave down on.

C、has a critical point.

D、is decreasing on.

Supposeandare two cumulative distribution functions. When isa cdf ? Hereis a constant.

A、

B、

C、

D、

Suppose a given binary tree has 10 left nodes，then the number of nodes with degree of 2 is

A．12

B．11

C．9

D．Indeterminable

Suppose the DTFT ofis. The DTFT ofis ( )

A、

B、

C、

D、

Suppose the nominal interest rate is 7 per cent while the money supply is growing at a rate of 5 per cent per year. If the government increases the growth rate of the money supply from 5 per cent to 9 per cent, the Fisher effect suggests that, in the long run, the nominal interest rate should become

A．4 per cent．

B．9 per cent

C．11 per cent．

D．12 per cent．

What do you suppose is the (significant) _______ of advertising through social networks?