Mathematics
Senior High
Solved
黒線のところの仕組みを教えてください、
(1) 2(-ab)+3(-1) "+1 a "b"+a^(-b)"
=2(-1)"a"b"+3(-1)(−1)"a"b"+a^(-1)"b"
=2(-1)"a"b"-3(-1)"a"b"+(-1)"a"b"
=(-1)"a"b"(2-3+1)=0
)-(2
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