let b1= 2;
	let q = 7;
	let n = 5;

	function GeomProg(b1, q, n){
				
		return b1 * Math.pow(q, (n - 1));
	}

	
	function ReqGeomProg(b1, q, n) {
	
		if(n == 1) return b1;
		
		return q * ReqGeomProg(b1, q, n - 1);
	
	}

	console.log(GeomProg(b1, q, n));

	console.log(ReqGeomProg(b1, q, n));