They probably will, but when they stop to pay more attention they may notice that you used them both in the same sentence, and did the same thing througout your entire essay. I think it works as a reasonable middle ground.
I'm just going off my own experience though. I'm curious if there's a way to effectively test how people react.
Scott Adams, author of Dilbert, believes that trying to try is more effective than trying:
Regular Less Wrong readers will remember Eliezer Yudkowsky's warning about trying to try:
Adams says the danger of trying is that you will fail in trying, which will bruise your self-esteem and cripple your motivation to try again. Yudkowsky says the danger of trying to try is that you will succeed in trying to try, leaving you too easily satisfied and unmotivated to actually do the thing you were trying to try to do.
Have any readers had success in trying to try?