How is the gdp/national income computed by using the value-added method? explain the difficulties and methods while calculating gdp in this process.

The value-added method for calculating GDP involves adding up all the net value added at the different stages of production.

The formula used to calculate GDP using the value-added method:

GDP = ∑ (P x Q)

where:

The net value added at each stage of production =  value of total output - cost of intermediate goods.

The main difficulty with this method is that it is more complex and requires more calculations, while other methods only add the value of final goods and doesn't account for the value of intermediate goods.  

the correct answer is:

it required the president to inform congress within forty-eight hours of any new troop commitment.

the war powers resolution (1973) is a federal law designed to limit the u.s. president’s ability to initiate or intensify military actions abroad without the approval of the congress.

it establishes that the president can send armed forces into action abroad only by declaration of war by congress, statutory authorization, or in case of a national emergency created by attack upon the united states, its territories or possessions, or its armed forces.

it requires the president to notify congress within 48 hours of sending armed forces to military action.