1+3+5+7+.+29+31分之2+4+6+8..+30+32xiexie
问题描述:
1+3+5+7+.+29+31分之2+4+6+8..+30+32xiexie
答
1+3+5+7+.+29+31分之2+4+6+8..+30+32
=2(1+2+...+16)/(1+31)x16÷2
=2x(1+16)x16÷2/(32x16)÷2
=17/16