Private-equity firm Silver Lake has struck a deal to invest $750 million in Indian telecom and technology giant Jio Platforms, less than two weeks after Facebook said it would pay $5.7 billion for a holding of about 10 percent in the company.Silver Lake's investment values Jio at $65 billion, about 12.5 percent more than the valuation implied by Facebook's recent deal.The pair of investments caps off a stunning ascent for the Indian telecom and digital services insurgent.