Question

数学题(回答好的加分):(-2)^2+[2-(1/3)^2-(-3/4)^2/(_3)^2]*9/13

要过程,一定要详细啊

我数学老师说答案是7/4,可我算的不是7/4,大家帮我算啊!!!!!!!!!!

回答好的加分
抱歉,题目打错了~~~~~~~~~~~~~

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Answer 1

(-2)^2/13+[2-(1/3)^2-(-3/4)^2/(-3)^2]*9/13
=4/13+[2-1/9-(9/16)/9]*9/13
=4/13+(2-1/9-1/16)*9/13
=4/13+2*9/13-(1/9)*(9/13)-(1/16)*(9/13)
=4/13+18/13-1/13-9/13*16
=(4+18-1)/13-9/13*16
=21/13-9/13*16
=(21*16-9)/13*16
=327/208