这个怎么解,需要详细过程,急求
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(1)80+8+6+4+2=100(万元)
(2)80+80×10%×4=112(万元)
(3)88-x+(88-x)×1.1-x+[(88-x)×1.1-x]×1.1-x+{[(88-x)×1.1-x]×1.1-x}×1.1=4x
88-x+96.8-2.1x+106.48-3.31x+127.128-4.641x=4x
15.051x=408.408
x=27.135(万元)
(4)80×(1+10%)^4=117.128(万元)
(2)80+80×10%×4=112(万元)
(3)88-x+(88-x)×1.1-x+[(88-x)×1.1-x]×1.1-x+{[(88-x)×1.1-x]×1.1-x}×1.1=4x
88-x+96.8-2.1x+106.48-3.31x+127.128-4.641x=4x
15.051x=408.408
x=27.135(万元)
(4)80×(1+10%)^4=117.128(万元)
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