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1/7x21/7x41/7x81/7x161/7x32+1/7x641/7*2+1/7*4+1/7*8+1/7*16+1/7*32+1/7*64怎样简算
题目详情
1/7x2 1/7x4 1/7x8 1/7x16 1/7x32+1/7x64
1/7*2+1/7*4+1/7*8+1/7*16+1/7*32+1/7*64怎样简算
1/7*2+1/7*4+1/7*8+1/7*16+1/7*32+1/7*64怎样简算
▼优质解答
答案和解析
=1/7x(1/2+1/4+1/8+.1/64)
=1/7x63/63
=9/64
=1/7x63/63
=9/64
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