题目内容
已知a=(2
)
-(9.6)0-(3
)-
+(1.5)-2,b=(log43+log83)(log32+log92),求a+2b的值.
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a=(2
)
-(9.6)0-(3
)-
+(1.5)-2
=(
)2×
-1-(
)3×(-
)+(
)-2
=
-1=
.
b=(log43+log83)(log32+log92)
=(
log23+
log23)(log32+
log32)
=
×
=
,
∴a=
,b=
,
∴a+2b=3.
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| 4 |
| 1 |
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=(
| 3 |
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| 1 |
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=
| 3 |
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b=(log43+log83)(log32+log92)
=(
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=
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=
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∴a=
| 1 |
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∴a+2b=3.
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