1.√41²-40²/196 2.2√1又2分之1除以41√6分之1 3.√20a除以三分之二√b乘以√a分之b
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![1.√41²-40²/196 2.2√1又2分之1除以41√6分之1 3.√20a除以三分之二√b乘以√a分之b](/uploads/image/z/305954-26-4.jpg?t=1.%E2%88%9A41%26%23178%3B-40%26%23178%3B%2F196+2.2%E2%88%9A1%E5%8F%882%E5%88%86%E4%B9%8B1%E9%99%A4%E4%BB%A541%E2%88%9A6%E5%88%86%E4%B9%8B1+3.%E2%88%9A20a%E9%99%A4%E4%BB%A5%E4%B8%89%E5%88%86%E4%B9%8B%E4%BA%8C%E2%88%9Ab%E4%B9%98%E4%BB%A5%E2%88%9Aa%E5%88%86%E4%B9%8Bb)
1.√41²-40²/196 2.2√1又2分之1除以41√6分之1 3.√20a除以三分之二√b乘以√a分之b
1.√41²-40²/196 2.2√1又2分之1除以41√6分之1 3.√20a除以三分之二√b乘以√a分之b
1.√41²-40²/196 2.2√1又2分之1除以41√6分之1 3.√20a除以三分之二√b乘以√a分之b
√41²-40²/196
=√9²/196
=9/14
2.2√1又2分之1除以41√6分之1
=2√(3/2) / [41√(1/6)]
=2/41*√(3/2x6)
=2/41*√9
=6/41
3.√20a除以三分之二√b乘以√a分之b
=2√5a x √(b/a) x 3/(2√b)
=2√(5axb/a) x 3/2(√b)
=2√(5b) x 3/2(√b)
=3√5
1.√41²-40²/196
=√(41+40)(41-40)/196
=√81/196
=9/14
2.2√1又2分之1除以41√6分之1
=2√(3/2)÷41√(1/6)
=2/41 ×√(3×6/2)
=2/41×3
=6/41
3.√20a除以三分之二√b乘以√a分之b
=2√5a×3/(2√b)×√(b/a)
=3√5