Question

state any 3 measures taken by the provisional govt. to suppress the bolshevik influence

Answer 1

They did very little, at least until the Bolsheviks forced their hand in July 1917. 
The Provisional Government was extremely weak - it was dependent upon the Petrograd Soviet for the loyalty of the soldiers and sailors in the captial's garrisons and for the support of the workers of the major industrial cities - it, therefore, could do little without upsetting the Soviet. 
When the July Days erupted the Bolsheviks found themselves thrust into the spotlight, with the workers demanding that they seize power. The Provisional Government was able to subdue the revolt, it arrested many leading Bolsheviks, banned their newspapers - it led to Lenin fleeing the capital in disguise. 

The weakness of the Provisional Government was highlighted when they first asked General Kornilov to march on Petrograd to 'restore order', then panicked as they realised that he was fundamentally counter-revolutionary. They then had to release their Bolshevik prisoners and ask Lenin to return from exile in order to stop the general. The Provisional Governement never again tried to control reduce the growing Bolshevik influence.