3.14x2x+2x=12.42求解方程
2个回答
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解:解方程, 此方程的解为x = 3/2,【即x = 1.5】
3.14 x 2x + 2x = 12.42
(3×100+14)/100 × 2x + 2x = (12×100+42)/100
314/100 × 2x + 2x = 1242/100
157/50 × 2x + 2x = 621/50
( 157/25)x + (50/25)x = 621/50
(207/25)x = 621/50
x = 621/50 ÷ 207/25
x = 621/50 × 25/207
x = 3/2
∴x = 1.5
答:此方程的解为x = 3/2,【即x = 1.5】
3.14 x 2x + 2x = 12.42
(3×100+14)/100 × 2x + 2x = (12×100+42)/100
314/100 × 2x + 2x = 1242/100
157/50 × 2x + 2x = 621/50
( 157/25)x + (50/25)x = 621/50
(207/25)x = 621/50
x = 621/50 ÷ 207/25
x = 621/50 × 25/207
x = 3/2
∴x = 1.5
答:此方程的解为x = 3/2,【即x = 1.5】
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