设数列{an}、{bn}都是等差数列,且a1=25,b1=75,a2+b2=100,则a37+b37等于( )
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设数列{an}、{bn}都是等差数列,且a1=25,b1=75,a2+b2=100,则a37+b37等于( )
A. 0
B. 37
C. 100
D. -37
A. 0
B. 37
C. 100
D. -37
∵数列{an}、{bn}都是等差数列,
∴数列{an+bn}也是等差数列,
∵a1+b1=25+75=100,a2+b2=100,
∴数列{an+bn}的公差为0,数列为常数列,
∴a37+b37=100
故选:C.
∴数列{an+bn}也是等差数列,
∵a1+b1=25+75=100,a2+b2=100,
∴数列{an+bn}的公差为0,数列为常数列,
∴a37+b37=100
故选:C.
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